Use non-prefixed -inline stylings

90 files changed, 537 insertions, 537 deletions

diff --git a/src/chrome/abouthome/abouthome.css b/src/chrome/abouthome/abouthome.css
index a6114b3..a2ca472 100644
--- a/src/chrome/abouthome/abouthome.css
+++ b/src/chrome/abouthome/abouthome.css
@@ -56,7 +56,7 @@ a {
   display: -moz-box;
   -moz-box-align: center;
   padding-top: 2px;
-  -moz-padding-end: 8px;
+  padding-inline-end: 8px;
 }
 
 #searchLogoContainer[hidden] {
@@ -91,7 +91,7 @@ a {
 }
 
 #searchSubmit {
-  -moz-margin-start: -1px;
+  margin-inline-start: -1px;
   padding: 0 9px;
   color: #fff;
   background-color: rgb(60, 60, 60);
@@ -234,7 +234,7 @@ body[narrow] #restorePreviousSession {
   display: inline-block; /* display on same line as text label */
   vertical-align: middle;
   margin-bottom: 0;
-  -moz-margin-end: 8px;
+  margin-inline-end: 8px;
 }
 
 #restorePreviousSession:-moz-dir(rtl)::before {
diff --git a/src/chrome/browser/aboutCertError.css b/src/chrome/browser/aboutCertError.css
index 50ec6a0..796896f 100644
--- a/src/chrome/browser/aboutCertError.css
+++ b/src/chrome/browser/aboutCertError.css
@@ -32,7 +32,7 @@ h2 {
   border: 1px solid #FFBD09; /* pale yellow extracted from yellow passport icon */
   border-radius: 10px;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   background: url("chrome://global/skin/icons/sslWarning.png") left 0 no-repeat rgb(50, 50, 50);
   background-origin: content-box;
 }
@@ -42,16 +42,16 @@ h2 {
 }
 
 #errorTitle {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 #errorLongContent {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 .expander > button {
-  -moz-padding-start: 20px;
-  -moz-margin-start: -20px;
+  padding-inline-start: 20px;
+  margin-inline-start: -20px;
   background: url("chrome://browser/skin/aboutCertError_sectionExpanded.png") left center no-repeat;
   border: none;
   font: inherit;
diff --git a/src/chrome/browser/aboutPrivateBrowsing.css b/src/chrome/browser/aboutPrivateBrowsing.css
index a10496f..a53708f 100644
--- a/src/chrome/browser/aboutPrivateBrowsing.css
+++ b/src/chrome/browser/aboutPrivateBrowsing.css
@@ -18,7 +18,7 @@ body.normal > #errorPageContainer {
 }
 
 #startPrivateBrowsingDesc > button {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 #footerDesc > p {
@@ -27,7 +27,7 @@ body.normal > #errorPageContainer {
 
 #moreInfo {
   font-size: 110%; /* to match the value set in chrome://global/skin/netError.css */
-  -moz-padding-start: 25px;
+  padding-inline-start: 25px;
   background: url("chrome://global/skin/icons/information-16.svg") no-repeat top left;
 }
 
diff --git a/src/chrome/browser/aboutSyncTabs.css b/src/chrome/browser/aboutSyncTabs.css
index 4f21a9d..1fcd830 100644
--- a/src/chrome/browser/aboutSyncTabs.css
+++ b/src/chrome/browser/aboutSyncTabs.css
@@ -22,18 +22,18 @@
   margin-top: 4px;
   width: 45em;
   height: 32px;
-  -moz-margin-start: 2em;
-  -moz-margin-end: 2em;
+  margin-inline-start: 2em;
+  margin-inline-end: 2em;
 }
 
 #tabsListHeading {
   font-size: 140%;
   font-weight: bold;
-  -moz-margin-start: 40px;
+  margin-inline-start: 40px;
 }
 
 richlistitem {
-  -moz-margin-end: 2em;
+  margin-inline-end: 2em;
 }
 
 richlistitem[selected="true"],
@@ -46,7 +46,7 @@ richlistitem[type="tab"] {
   border: #999999 1px solid !important;
   padding: 2px 5px;
   margin-bottom: 4px;
-  -moz-margin-start: 4em;
+  margin-inline-start: 4em;
   border-radius: 6px;
   background-color: menu;
   width: 44em;
@@ -64,7 +64,7 @@ richlistitem[type="tab"][selected="true"] {
 richlistitem[type="client"] {
   min-height: 2em;
   color: #000000;
-  -moz-margin-start: 2em;
+  margin-inline-start: 2em;
   margin-top: 2px;
   margin-bottom: 3px;
   width: 42em;
@@ -96,6 +96,6 @@ richlistitem.desktop[type="client"] {
 }
 
 .tabIcon {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
   padding-top: 2px;
 }
diff --git a/src/chrome/browser/aboutTabCrashed.css b/src/chrome/browser/aboutTabCrashed.css
index f5bfaf8..c116c2f 100644
--- a/src/chrome/browser/aboutTabCrashed.css
+++ b/src/chrome/browser/aboutTabCrashed.css
@@ -11,7 +11,7 @@ p {
 
 #error-box {
   background: url('chrome://global/skin/icons/information-24.png') no-repeat left 4px;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
 }
 
 #error-box:-moz-locale-dir(rtl) {
@@ -46,7 +46,7 @@ p {
     margin: 0 auto;
     background-image: url('chrome://global/skin/icons/information-32.png');
     min-height: 36px;
-    -moz-padding-start: 38px;
+    padding-inline-start: 38px;
   }
 
   button {
diff --git a/src/chrome/browser/browser.css b/src/chrome/browser/browser.css
index 7f8286b..bca2a2f 100644
--- a/src/chrome/browser/browser.css
+++ b/src/chrome/browser/browser.css
@@ -156,8 +156,8 @@
 /* ::::: app menu button ::::: */
 
 .splitmenu-menuitem {
-  -moz-margin-end: 1px;
-  -moz-padding-end: 0.5em;
+  margin-inline-end: 1px;
+  padding-inline-end: 0.5em;
 }
 
 .splitmenu-menu {
@@ -177,7 +177,7 @@
 }
 
 #appmenuPrimaryPane {
-  -moz-border-end: 1px solid ThreeDShadow;
+  border-inline-end: 1px solid ThreeDShadow;
 }
 
 #appmenu-popup {
@@ -188,12 +188,12 @@
 #appmenuPrimaryPane {
   background-color: rgb(62,62,62);
   padding: 2px;
-  -moz-border-end: none;
+  border-inline-end: none;
 }
 #appmenuSecondaryPane {
   background-color: rgb(50,50,50);
-  -moz-padding-start: 3px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 3px;
+  padding-inline-end: 2px;
   padding-top: 2px;
   padding-bottom: 2px;
   font-family: "Segoe UI Semibold", "Segoe UI", sans-serif;
@@ -203,7 +203,7 @@
   -moz-appearance: none;
   margin-top: 3px;
   margin-bottom: 3px;
-  -moz-margin-start: 30px;
+  margin-inline-start: 30px;
   padding: 0;
   border-top: 1px solid #e1e1e1;
   border-bottom: none;
@@ -306,7 +306,7 @@ menuitem.bookmark-item {
 }
 
 .bookmark-item > .menu-iconic-left > .menu-iconic-icon {
-  -moz-padding-start: 0px;
+  padding-inline-start: 0px;
 }
 
 /* ::::: bookmark items ::::: */
@@ -410,7 +410,7 @@ toolbar:not([brighttext]) .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarke
 
 .toolbarbutton-1 > .toolbarbutton-icon,
 .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 toolbar[mode=full] .toolbarbutton-1:not([type=menu-button]) {
@@ -451,11 +451,11 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 }
 
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  -moz-padding-end: 0;
+  padding-inline-end: 0;
 }
 
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  -moz-padding-start: 0;
+  padding-inline-start: 0;
   -moz-box-align: center;
 }
 
@@ -483,15 +483,15 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar .toolbarbutton-1[type=menu]:not(#back-button):not(#forward-button):not(#feed-button):not(#social-provider-button) > .toolbarbutton-icon,
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar .toolbarbutton-1[type=menu] > .toolbarbutton-text  {
-  -moz-padding-end: 17px;
+  padding-inline-end: 17px;
 }
 
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar .toolbarbutton-1 > .toolbarbutton-menu-dropmarker {
-  -moz-margin-start: -15px;
+  margin-inline-start: -15px;
 }
 
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  -moz-border-end: none;
+  border-inline-end: none;
 }
 
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
@@ -514,7 +514,7 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
   display: -moz-box;
   width: 1px;
   height: 18px;
-  -moz-margin-end: -1px;
+  margin-inline-end: -1px;
   background-image: linear-gradient(hsla(210,54%,20%,.2) 0, hsla(210,54%,20%,.2) 18px);
   background-clip: padding-box;
   background-position: center;
@@ -550,7 +550,7 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 }
 
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar .toolbarbutton-1:-moz-any(:hover,[open]) > .toolbarbutton-menubutton-dropmarker:not([disabled]) > .dropmarker-icon {
-  -moz-border-start-color: hsla(210,54%,20%,.35);
+  border-inline-start-color: hsla(210,54%,20%,.35);
 }
 
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar .toolbarbutton-1[checked]:not(:active):hover > .toolbarbutton-icon {
@@ -606,8 +606,8 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 }
 
 window:not([chromehidden~=toolbar]) #navigator-toolbox[iconsize=large][mode=icons] > :-moz-any(#nav-bar[currentset*="unified-back-forward-button,urlbar-container"],#nav-bar:not([currentset])) > #unified-back-forward-button > #forward-button > .toolbarbutton-icon {
-  -moz-margin-start: -4px !important;
-  -moz-margin-end: -2px !important;
+  margin-inline-start: -4px !important;
+  margin-inline-end: -2px !important;
   
   padding-left: 2px;
   padding-right: 2px;
@@ -783,7 +783,7 @@ toolbar:not([brighttext]) #tabview-button {
 /* ::::: fullscreen window controls ::::: */
 
 #TabsToolbar > #window-controls {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
 }
 
 #minimize-button,
@@ -841,7 +841,7 @@ toolbar:not([brighttext]) #tabview-button {
 
 #urlbar {
   width: 7em;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
 }
 
 #urlbar:-moz-lwtheme,
@@ -871,7 +871,7 @@ html|*.urlbar-input:-moz-lwtheme:-moz-placeholder,
 }
 
 .urlbar-input-box {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   min-width: 4em;
 }
 
@@ -890,25 +890,25 @@ html|*.urlbar-input:-moz-lwtheme:-moz-placeholder,
 
 #urlbar-search-splitter {
   min-width: 6px;
-  -moz-margin-start: -3px;
+  margin-inline-start: -3px;
   border: none;
   background: transparent;
 }
 
 #urlbar-search-splitter + #urlbar-container > #urlbar ,
 #urlbar-search-splitter + #search-container > #searchbar > .searchbar-textbox {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 #urlbar-display-box {
-  -moz-border-end: 1px solid #AAA;
-  -moz-margin-end: 3px;
+  border-inline-end: 1px solid #AAA;
+  margin-inline-end: 3px;
 }
 
 #urlbar-display {
   margin-top: 0;
   margin-bottom: 0;
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   color: GrayText;
 }
 
@@ -931,14 +931,14 @@ html|*.urlbar-input:-moz-lwtheme:-moz-placeholder,
 }
 
 #notification-popup-box:not([hidden]) + #identity-box {
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
   border-radius: 0;
 }
 
 #urlbar[pageproxystate="valid"] > #identity-box.chromeUI,
 #urlbar[pageproxystate="valid"] > #identity-box.verifiedIdentity,
 #urlbar[pageproxystate="valid"] > #identity-box.verifiedDomain {
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
 }
 
 #identity-box:-moz-focusring {
@@ -947,8 +947,8 @@ html|*.urlbar-input:-moz-lwtheme:-moz-placeholder,
 }
 
 #identity-icon-labels {
-  -moz-padding-start: 2px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 2px;
+  padding-inline-end: 5px;
 }
 
 /* Location bar dropmarker */
@@ -1006,8 +1006,8 @@ html|*.urlbar-input:-moz-lwtheme:-moz-placeholder,
   list-style-image: url(chrome://browser/skin/identity-not-secure.svg);
   margin-top: 1px;
   margin-bottom: 1px;
-  -moz-margin-start: 3px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 3px;
+  margin-inline-end: 2px;
   -moz-image-region: rect(0, 16px, 16px, 0);
 }
 
@@ -1031,7 +1031,7 @@ html|*.urlbar-input:-moz-lwtheme:-moz-placeholder,
 }
 
 window:not([chromehidden~=toolbar]) #navigator-toolbox[iconsize=large][mode=icons] > :-moz-any(#nav-bar[currentset*="unified-back-forward-button,urlbar-container"],#nav-bar:not([currentset])) > #unified-back-forward-button + #urlbar-container > #urlbar > #identity-box > #page-proxy-favicon {
-  -moz-margin-end: 1px;
+  margin-inline-end: 1px;
 }
 
 /* autocomplete */
@@ -1250,7 +1250,7 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 }
 
 #sidebar-title {
-  -moz-padding-start: 0px;
+  padding-inline-start: 0px;
 }
 
 #sidebar-search-container {
@@ -1319,7 +1319,7 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
   border-bottom: 0px;
   border-radius: var(--tab-border-radius) var(--tab-border-radius) 0 0;
   box-shadow: var(--tab-box-shadow);
-  -moz-margin-start: -1px;
+  margin-inline-start: -1px;
   color: #fff;
 }
 
@@ -1345,7 +1345,7 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 }
 
 .tabbrowser-arrowscrollbox > .arrowscrollbox-scrollbox {
-  -moz-padding-start: 1px;
+  padding-inline-start: 1px;
 }
 
 .tabbrowser-tab:hover,
@@ -1371,8 +1371,8 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
   height: 16px;
   list-style-image: url(chrome://browser/skin/places/places.svg);
   -moz-image-region: rect(2px, 396px, 18px, 380px);
-  -moz-margin-start: 2px;
-  -moz-margin-end: 3px;
+  margin-inline-start: 2px;
+  margin-inline-end: 3px;
 }
 
 .tab-throbber {
@@ -1391,8 +1391,8 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 
 .tab-throbber[pinned],
 .tab-icon-image[pinned] {
-  -moz-margin-start: 5px;
-  -moz-margin-end: 5px;
+  margin-inline-start: 5px;
+  margin-inline-end: 5px;
 }
 
 .tabbrowser-tab[label="about:config"] > * > * > .tab-icon-image {
@@ -1449,12 +1449,12 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
   transform: scaleX(-1);
 }
 .tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-start-indicator:not([collapsed]) {
-  -moz-margin-start: -2px;
-  -moz-margin-end: -12px;
+  margin-inline-start: -2px;
+  margin-inline-end: -12px;
 }
 .tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-end-indicator:not([collapsed]) {
-  -moz-margin-start: -12px;
-  -moz-margin-end: -2px;
+  margin-inline-start: -12px;
+  margin-inline-end: -2px;
 }
 .tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-start-indicator[collapsed],
 .tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-end-indicator[collapsed] {
@@ -1606,9 +1606,9 @@ toolbar:not([brighttext]) #alltabs-button[type="menu"] {
 }
 
 .tabs-closebutton > .toolbarbutton-icon {
-  -moz-margin-end: 0px !important;
-  -moz-padding-end: 2px !important;
-  -moz-padding-start: 2px !important;
+  margin-inline-end: 0px !important;
+  padding-inline-end: 2px !important;
+  padding-inline-start: 2px !important;
 }
 
 toolbarbutton.chevron {
@@ -1634,7 +1634,7 @@ toolbar[mode="text"] toolbarbutton.chevron > .toolbarbutton-icon {
 
 #sidebar-throbber[loading="true"] {
   list-style-image: url("chrome://global/skin/icons/loading_16.png");
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
 }
 
 
@@ -1659,7 +1659,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 .menupopup-drop-indicator {
   list-style-image: none;
   height: 2px;
-  -moz-margin-end: -4em;
+  margin-inline-end: -4em;
   background-color: Highlight;
 }
 
@@ -1685,13 +1685,13 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 /* Popup Body Text */
 .identity-popup-description {
   white-space: pre-wrap;
-  -moz-padding-start: 15px;
+  padding-inline-start: 15px;
   margin: 2px 0 4px;
 }
 
 .identity-popup-label {
   white-space: pre-wrap;
-  -moz-padding-start: 15px;
+  padding-inline-start: 15px;
   margin: 0;
 }
 
@@ -1725,7 +1725,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 #identity-popup-content-box.verifiedIdentity > #identity-popup-encryption ,
 #identity-popup-content-box.verifiedDomain > #identity-popup-encryption {
   margin-top: 10px;
-  -moz-margin-start: -24px;
+  margin-inline-start: -24px;
 }
 
 #identity-popup-content-box.verifiedIdentity > #identity-popup-encryption > vbox > #identity-popup-encryption-icon ,
@@ -1755,13 +1755,13 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 #identity-popup-more-info-button {
   margin-top: 6px;
   margin-bottom: 0;
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 .popup-notification-icon {
   width: 64px;
   height: 64px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
 }
 
 .popup-notification-icon[popupid="geolocation"] {
@@ -1805,8 +1805,8 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 
 .popup-progress-label,
 .popup-progress-meter {
-  -moz-margin-start: 0;
-  -moz-margin-end: 0;
+  margin-inline-start: 0;
+  margin-inline-end: 0;
 }
 
 .popup-progress-cancel {
@@ -1870,7 +1870,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
   border-width: 0 8px 0 0;
   border-style: solid;
   -moz-border-image: url("chrome://browser/skin/urlbar-arrow.svg") 0 8 0 0 / 0 8px 0 0;
-  -moz-margin-end: -8px;
+  margin-inline-end: -8px;
   margin-top: -2px;
   margin-bottom: -2px;
 }
@@ -2127,8 +2127,8 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 }
 
 #allTabs-filter {
-  -moz-margin-start: 24px;
-  -moz-margin-end: 0;
+  margin-inline-start: 24px;
+  margin-inline-end: 0;
 }
 
 #allTabs-tab-close-button > .toolbarbutton-icon {
@@ -2141,10 +2141,10 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
   height: 22px;
   padding-top: 1px;
   padding-bottom: 5px;
-  -moz-padding-start: 1px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 1px;
+  padding-inline-end: 5px;
   margin-top: -2px;
-  -moz-margin-start: -2px;
+  margin-inline-start: -2px;
   border-bottom-right-radius: 4px;
 }
 
@@ -2387,7 +2387,7 @@ toolbar[mode="text"] #addonbar-closebutton > .toolbarbutton-icon {
   -moz-appearance: none;
   color: inherit;
   border-width: 0;
-  -moz-border-end: 1px solid hsla(210,8%,5%,.45);
+  border-inline-end: 1px solid hsla(210,8%,5%,.45);
   box-shadow: -1px 0 0 hsla(210,16%,76%,.15) inset, 1px 0 0 hsla(210,16%,76%,.15);
 }
 
@@ -2835,7 +2835,7 @@ html|*#gcli-output-frame {
 }
 
 .center-item-label {
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
   margin-bottom: 0;
   text-overflow: ellipsis;
 }
@@ -2845,7 +2845,7 @@ html|*#gcli-output-frame {
   background-repeat: no-repeat;
   width: 16px;
   height: 15px;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
 }
 
 .click-to-play-plugins-notification-button-container {
@@ -2879,7 +2879,7 @@ html|*#gcli-output-frame {
   text-shadow: none;
   background-image: linear-gradient(#B4211B, #8A1915);
   border-radius: 1px;
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 
 .messageImage[value="plugin-hidden"] {
@@ -2921,7 +2921,7 @@ notification.pluginVulnerable .messageImage {
 
 .toolbarbutton-badge-container > .toolbarbutton-icon[label]:not([label=""]),
 .toolbarbutton-badge-stack > .toolbarbutton-icon[label]:not([label=""]) {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 #navigator-toolbox[iconsize=large][mode=icons] > #nav-bar *|* > .toolbarbutton-badge[badge]:not([badge=""])::after {
diff --git a/src/chrome/browser/downloads/allDownloadsViewOverlay.css b/src/chrome/browser/downloads/allDownloadsViewOverlay.css
index e1a96fa..814985d 100644
--- a/src/chrome/browser/downloads/allDownloadsViewOverlay.css
+++ b/src/chrome/browser/downloads/allDownloadsViewOverlay.css
@@ -14,8 +14,8 @@
 }
 
 .downloadTypeIcon {
-  -moz-margin-end: 8px;
-  -moz-margin-start: 8px;
+  margin-inline-end: 8px;
+  margin-inline-start: 8px;
   /* explicitly size the icon, so size doesn't vary on hidpi systems */
   height: 32px;
   width: 32px;
diff --git a/src/chrome/browser/downloads/downloads.css b/src/chrome/browser/downloads/downloads.css
index 6a48460..6e25f75 100644
--- a/src/chrome/browser/downloads/downloads.css
+++ b/src/chrome/browser/downloads/downloads.css
@@ -47,7 +47,7 @@
 #downloadsSummary,
 richlistitem[type="download"] {
   height: 7em;
-  -moz-padding-end: 0;
+  padding-inline-end: 0;
   color: inherit;
 }
 
@@ -88,7 +88,7 @@ richlistitem[type="download"]:first-child {
 }
 
 .downloadTypeIcon {
-  -moz-margin-end: 8px;
+  margin-inline-end: 8px;
   /* Prevent flickering when changing states. */
   height: 32px;
   width: 32px;
@@ -325,7 +325,7 @@ toolbar:not([brighttext]) #downloads-indicator-counter {
   background-image: linear-gradient(#505050, #575757);
   border: 1px solid;
   border-color: hsla(0,0%,0%,.6) hsla(0,0%,0%,.4) hsla(0,0%,0%,.4);
-  -moz-border-start: none;
+  border-inline-start: none;
   border-radius: 0 2px 2px 0;
 }
 
diff --git a/src/chrome/browser/engineManager.css b/src/chrome/browser/engineManager.css
index 6a1076e..0a9ccf2 100644
--- a/src/chrome/browser/engineManager.css
+++ b/src/chrome/browser/engineManager.css
@@ -1,7 +1,7 @@
 
 #engineList treechildren::-moz-tree-image(engineName) {
-  -moz-margin-end: 4px;
-  -moz-margin-start: 1px;
+  margin-inline-end: 4px;
+  margin-inline-start: 1px;
   width: 16px;
   height: 16px;
 }
diff --git a/src/chrome/browser/feeds/subscribe-ui.css b/src/chrome/browser/feeds/subscribe-ui.css
index 85da386..b806a27 100644
--- a/src/chrome/browser/feeds/subscribe-ui.css
+++ b/src/chrome/browser/feeds/subscribe-ui.css
@@ -7,17 +7,17 @@
 }
 
 .handlersMenuPopup > menuitem {
-  -moz-padding-start: 23px;
+  padding-inline-start: 23px;
 }
 
 .handlersMenuPopup > menuitem.menuitem-iconic {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 .handlersMenuPopup > .menuitem-iconic  > .menu-iconic-left {
   display: -moz-box;
   min-width: 16px;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
 }
 
 .chooseApplicationMenuItem {
diff --git a/src/chrome/browser/feeds/subscribe.css b/src/chrome/browser/feeds/subscribe.css
index 656a30e..e42adc1 100644
--- a/src/chrome/browser/feeds/subscribe.css
+++ b/src/chrome/browser/feeds/subscribe.css
@@ -11,7 +11,7 @@ html {
   border: 1px solid rgb(50,50,50);
   border-radius: 10px;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   margin: 2em auto;
   background: rgb(43,43,43);
 }
@@ -26,9 +26,9 @@ html {
 #feedHeader {  
   margin-top: 4.9em;
   margin-bottom: 1em;
-  -moz-margin-start: 1.4em;
-  -moz-margin-end: 1em;
-  -moz-padding-start: 2.9em;
+  margin-inline-start: 1.4em;
+  margin-inline-end: 1em;
+  padding-inline-start: 2.9em;
   font-size: 110%;
   color: #fff;
 }
@@ -49,12 +49,12 @@ html {
 
 #feedHeader[firstrun="true"] #feedIntroText {
   padding-top: 0.1em;
-  -moz-padding-start: 0.6em;
+  padding-inline-start: 0.6em;
   display: block;
 }
 
 #feedHeader[firstrun="true"] > #feedSubscribeLine {
-  -moz-padding-start: 1.8em;
+  padding-inline-start: 1.8em;
 }
 
 #feedSubscribeLine {
@@ -89,8 +89,8 @@ h2 {
 
 #feedTitleLink {
   float: right;
-  -moz-margin-start: .6em;
-  -moz-margin-end: 0;
+  margin-inline-start: .6em;
+  margin-inline-end: 0;
   margin-top: 0;
   margin-bottom: 0;
 }
@@ -100,15 +100,15 @@ a[href] img {
 }
 
 #feedTitleContainer {
-  -moz-margin-start: 0;
-  -moz-margin-end: .6em;
+  margin-inline-start: 0;
+  margin-inline-end: .6em;
   margin-top: 0;
   margin-bottom: 0;
 }
 
 #feedTitleImage {
-  -moz-margin-start: .6em;
-  -moz-margin-end: 0;
+  margin-inline-start: .6em;
+  margin-inline-end: 0;
   margin-top: 0;
   margin-bottom: 0;
   max-width: 300px;
diff --git a/src/chrome/browser/newtab/newTab.css b/src/chrome/browser/newtab/newTab.css
index 33ec219..bc8827d 100644
--- a/src/chrome/browser/newtab/newTab.css
+++ b/src/chrome/browser/newtab/newTab.css
@@ -99,7 +99,7 @@
 
 /* CELLS */
 .newtab-cell {
-  -moz-margin-end: 20px;
+  margin-inline-end: 20px;
   background-color: rgb(50,50,50);
   border: 1px solid rgb(75,75,75);
   transition: border-color 100ms ease-out;
@@ -110,7 +110,7 @@
 }
 
 .newtab-cell:last-child {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 .newtab-cell:hover:not(:empty) {
@@ -270,7 +270,7 @@
 }
 
 #searchSubmit {
-  -moz-margin-start: -1px;
+  margin-inline-start: -1px;
   padding: 0 9px;
   color: #fff;
   background-color: rgb(60, 60, 60);
diff --git a/src/chrome/browser/pageInfo.css b/src/chrome/browser/pageInfo.css
index 2cf0e86..f0a437f 100644
--- a/src/chrome/browser/pageInfo.css
+++ b/src/chrome/browser/pageInfo.css
@@ -6,7 +6,7 @@
 
 /* View buttons */
 #viewGroup {
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
 }
 
 #viewGroup > radio {
@@ -31,7 +31,7 @@
 
 #topBar {
   border-bottom: 1px solid rgb(75,75,75);
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
   background-color: rgb(43,43,43);
   color: #fff;
 }
@@ -98,7 +98,7 @@ textbox {
 }
 
 textbox.header {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 .iframe {
@@ -121,8 +121,8 @@ groupbox.collapsable caption .caption-icon {
   height: 9px;
   background-repeat: no-repeat;
   background-position: center;
-  -moz-margin-start: 2px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 2px;
+  margin-inline-end: 2px;
   background-image: url("chrome://global/skin/tree/twisty-open.png");
 }
 
@@ -142,7 +142,7 @@ groupbox tree {
 }
 
 #securityBox description { 
-  -moz-margin-start: 10px;
+  margin-inline-start: 10px;
 }
 
 #general-security-identity {
@@ -187,8 +187,8 @@ treechildren::-moz-tree-cell-text(broken) {
 #feedListbox richlistitem {
   padding-top: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 7px;
-  -moz-padding-end: 7px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
   min-height: 25px;
   border-bottom: 1px dotted rgb(75,75,75);
 }
@@ -218,8 +218,8 @@ treechildren::-moz-tree-cell-text(broken) {
 .permission {
   padding-top: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 7px;
-  -moz-padding-end: 7px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
   min-height: 25px;
   border-bottom: 1px dotted rgb(75,75,75);
 }
diff --git a/src/chrome/browser/permissions/aboutPermissions.css b/src/chrome/browser/permissions/aboutPermissions.css
index 3fa306f..266f2ff 100644
--- a/src/chrome/browser/permissions/aboutPermissions.css
+++ b/src/chrome/browser/permissions/aboutPermissions.css
@@ -41,7 +41,7 @@
 .site-favicon {
   height: 16px;
   width: 16px;
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
 }
 
@@ -58,7 +58,7 @@
 
 #site-description {
   font-size: 125%;
-  -moz-margin-start: 6px; /* to match button margin */
+  margin-inline-start: 6px; /* to match button margin */
 }
 
 #site-label {
@@ -70,7 +70,7 @@
 #defaults-description {
   font-size: 125%;
   font-weight: bold;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
 }
 
 .pref-item {
@@ -80,7 +80,7 @@
 .pref-icon {
   width: 48px;
   height: 48px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
 }
 
 .pref-icon[type="password"] {
diff --git a/src/chrome/browser/places/editBookmarkOverlay.css b/src/chrome/browser/places/editBookmarkOverlay.css
index 16d6b82..11219eb 100644
--- a/src/chrome/browser/places/editBookmarkOverlay.css
+++ b/src/chrome/browser/places/editBookmarkOverlay.css
@@ -24,7 +24,7 @@
 .expander-down {
   min-width: 0;
   margin: 0;
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
 }
 
 .expander-up > .button-box,
@@ -93,5 +93,5 @@ menuitem.folder-icon[_moz-menuactive="true"] {
 }
 
 #editBMPanel_folderMenuList > .menulist-label-box > .menulist-icon{
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
 }
diff --git a/src/chrome/browser/places/organizer.css b/src/chrome/browser/places/organizer.css
index 6e3dacc..81abd62 100644
--- a/src/chrome/browser/places/organizer.css
+++ b/src/chrome/browser/places/organizer.css
@@ -9,7 +9,7 @@
 /* Toolbar */
 #placesToolbar {
   padding: 3px;
-  -moz-padding-end: 6px;
+  padding-inline-end: 6px;
 }
 
 #placesToolbar > toolbarbutton[disabled] > .toolbarbutton-icon {
@@ -38,14 +38,14 @@
 
 /* Menu */
 #placesMenu {
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
   -moz-appearance: none;
   border: none;
 }
 
 #placesMenu > menu {
-  -moz-padding-start: 4px;
-  -moz-padding-end: 1px;
+  padding-inline-start: 4px;
+  padding-inline-end: 1px;
   padding-top: 2px;
   padding-bottom: 2px;
   -moz-appearance: none;
@@ -69,7 +69,7 @@
 }
 
 #placesMenu > menu > .menubar-text {
-  -moz-padding-end: 8px;
+  padding-inline-end: 8px;
   background: url(chrome://global/skin/arrow/arrow-v.svg#dn) right center no-repeat;
 }
 
@@ -111,7 +111,7 @@
 }
 
 #infoBoxExpanderLabel {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 #searchFilter {
@@ -127,8 +127,8 @@
 }
 
 #clearDownloadsButton {
-  -moz-padding-start: 9px;
-  -moz-padding-end: 9px;
+  padding-inline-start: 9px;
+  padding-inline-end: 9px;
 }
 
 
@@ -146,11 +146,11 @@
   
 #placesView > splitter {
   border: 0;
-  -moz-border-end: 1px solid rgb(75,75,75);
+  border-inline-end: 1px solid rgb(75,75,75);
   min-width: 0;
   width: 3px;
   background-color: transparent;
-  -moz-margin-start: -3px;
+  margin-inline-start: -3px;
   position: relative;
 }
 
@@ -165,7 +165,7 @@
 #searchFilter {
   -moz-appearance: none;
   padding: 4px;
-  -moz-padding-start: 6px;
+  padding-inline-start: 6px;
   background-color: rgb(50,50,50);
   background-clip: padding-box;
   border: 1px solid rgb(75,75,75);
diff --git a/src/chrome/browser/places/places.css b/src/chrome/browser/places/places.css
index a59635b..040809c 100644
--- a/src/chrome/browser/places/places.css
+++ b/src/chrome/browser/places/places.css
@@ -141,5 +141,5 @@ treechildren::-moz-tree-cell-text(selected, focus) {
 #viewButton > .button-box > .button-menu-dropmarker {
   height: auto;
   width: auto;
-  -moz-margin-end: -3px;
+  margin-inline-end: -3px;
 }
diff --git a/src/chrome/browser/preferences/applications.css b/src/chrome/browser/preferences/applications.css
index 1235c90..1be0d18 100644
--- a/src/chrome/browser/preferences/applications.css
+++ b/src/chrome/browser/preferences/applications.css
@@ -11,18 +11,18 @@
 .actionsMenu {
   margin-top: 0;
   margin-bottom: 0;
-  -moz-margin-start: -2px;
-  -moz-margin-end: 0;
+  margin-inline-start: -2px;
+  margin-inline-end: 0;
 }
 
 .typeIcon,
 .actionIcon {
-  -moz-margin-start: 3px;
-  -moz-margin-end: 3px;
+  margin-inline-start: 3px;
+  margin-inline-end: 3px;
 }
 
 #handlersView > richlistitem label {
-  -moz-margin-start: 1px;
+  margin-inline-start: 1px;
   margin-top: 2px;
 }
 
@@ -51,14 +51,14 @@ menuitem[appHandlerIcon="plugin"] {
 }
 
 .actionsMenu .menulist-icon {
-  -moz-margin-end: 3px;
+  margin-inline-end: 3px;
 }
 
 .actionsMenu > menupopup > menuitem > .menu-iconic-left {
-  -moz-padding-start: 0px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 0px;
+  padding-inline-end: 2px;
 }
 
 .actionsMenu > menupopup > menuitem {
-  -moz-padding-start: 4px;
+  padding-inline-start: 4px;
 }
diff --git a/src/chrome/browser/sanitizeDialog.css b/src/chrome/browser/sanitizeDialog.css
index 4312eb8..58e1f29 100644
--- a/src/chrome/browser/sanitizeDialog.css
+++ b/src/chrome/browser/sanitizeDialog.css
@@ -3,12 +3,12 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #sanitizeDurationChoice {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 /* Align the duration label with the warning box and item list */
 #sanitizeDurationLabel {
-  -moz-margin-start: 3px;
+  margin-inline-start: 3px;
 }
 
 
@@ -79,15 +79,15 @@
 
 /* Make the item list the same width as the warning box */
 #itemList {
-  -moz-margin-start: 0;
-  -moz-margin-end: 0;
+  margin-inline-start: 0;
+  margin-inline-end: 0;
 }
 
 
 /* Align the last dialog button with the end of the warning box */
 .prefWindow-dlgbuttons {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 .dialog-button[dlgtype="cancel"] {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
diff --git a/src/chrome/browser/searchbar.css b/src/chrome/browser/searchbar.css
index 4f0c716..4bb67f1 100644
--- a/src/chrome/browser/searchbar.css
+++ b/src/chrome/browser/searchbar.css
@@ -22,7 +22,7 @@
   width: 16px;
   list-style-image: url(chrome://browser/skin/places/places.svg);
   -moz-image-region: rect(2px, 396px, 18px, 380px);
-  -moz-margin-start: 2px;
+  margin-inline-start: 2px;
 }
 
 .searchbar-engine-button {
@@ -30,7 +30,7 @@
   min-width: 0;
   margin: 0;
   padding: 0;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
   -moz-box-align: center;
   background: none;
   border: none;
diff --git a/src/chrome/browser/statusbar/overlay.css b/src/chrome/browser/statusbar/overlay.css
index 56f1997..ee975ce 100644
--- a/src/chrome/browser/statusbar/overlay.css
+++ b/src/chrome/browser/statusbar/overlay.css
@@ -181,7 +181,7 @@ splitter.status4evar-status-splitter:not(:hover) {
 }
 
 toolbar[mode="icons"] #status4evar-download-button[forcelabel="true"] > label {
-        -moz-margin-start: 5px !important;
+        margin-inline-start: 5px !important;
 }
 
 /*
@@ -198,7 +198,7 @@ splitter.status4evar-status-splitter {
  */
 
 #urlbar-progress-alt {
-        -moz-margin-end: -2px;
+        margin-inline-end: -2px;
 }
 
 /*
diff --git a/src/chrome/browser/syncCommon.css b/src/chrome/browser/syncCommon.css
index f682cb9..8e48969 100644
--- a/src/chrome/browser/syncCommon.css
+++ b/src/chrome/browser/syncCommon.css
@@ -8,7 +8,7 @@
 }
 
 .statusIcon {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
   max-height: 16px;
   max-width: 16px;
 }
diff --git a/src/chrome/browser/syncSetup.css b/src/chrome/browser/syncSetup.css
index ec1bc0f..dd99ebc 100644
--- a/src/chrome/browser/syncSetup.css
+++ b/src/chrome/browser/syncSetup.css
@@ -100,7 +100,7 @@ description > .text-link:focus {
 }
 
 .inputColumn {
-  -moz-margin-end: 2px
+  margin-inline-end: 2px
 }
 
 .pin {
diff --git a/src/chrome/browser/tabview/tabview.css b/src/chrome/browser/tabview/tabview.css
index 4a7cc94..7aa2f0c 100644
--- a/src/chrome/browser/tabview/tabview.css
+++ b/src/chrome/browser/tabview/tabview.css
@@ -14,9 +14,9 @@ body {
 .tab {
   margin: 4px;
   padding-top: 4px;
-  -moz-padding-end: 6px;
+  padding-inline-end: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 4px;
+  padding-inline-start: 4px;
   background-color: #FFFFFF;
   border-radius: 0.4em;
   cursor: pointer;
@@ -48,12 +48,12 @@ html[dir=rtl] .thumb {
 .favicon {
   background-color: #FFFFFF;
   padding-top: 4px;
-  -moz-padding-end: 6px;
+  padding-inline-end: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 4px;
+  padding-inline-start: 4px;
   top: 4px;
   left: 4px;
-  -moz-border-end: 1px solid rgba(73, 99, 119, 0.3);
+  border-inline-end: 1px solid rgba(73, 99, 119, 0.3);
   border-bottom: 1px solid rgba(73, 99, 119, 0.3);
   height: 17px;
   width: 17px;
@@ -266,7 +266,7 @@ html[dir=rtl] .overlay {
 .appTabTrayContainer {
   top: 34px;
   right: 1px;
-  -moz-border-start: 1px solid #E1E1E1;
+  border-inline-start: 1px solid #E1E1E1;
   padding: 0 5px;
   overflow: -moz-hidden-unscrollable;
   text-align: start;
@@ -314,8 +314,8 @@ html[dir=rtl] .appTabTrayContainer {
   background-color: #A0A0A0;
   padding-top: 3px;
   padding-bottom: 3px;
-  -moz-padding-start: 5px;
-  -moz-padding-end: 20px;
+  padding-inline-start: 5px;
+  padding-inline-end: 20px;
   width: 135px;
   line-height: 25px;
   box-shadow: 0px 1px 0px rgba(255,255,255,.5), 0px -1px 0px rgba(0,0,0,.24);
@@ -353,7 +353,7 @@ html[dir=rtl] .undo .close {
   opacity: 0.9;
   border: 1px dashed  rgba(0,0,0,.12);
   border-bottom: none;
-  -moz-border-end: none;
+  border-inline-end: none;
   box-shadow: 1px 1px 0 rgba(255,255,255,.15);
 }
 
@@ -413,9 +413,9 @@ input.name {
   border: 1px solid transparent;
   color: #999;
   margin-top: 3px;
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
   margin-bottom: 0;
-  -moz-margin-start: 3px;
+  margin-inline-start: 3px;
   padding: 1px;
 }
 
@@ -456,9 +456,9 @@ input.name:focus::-moz-placeholder {
 
 .title-shield {
   margin-top: 3px;
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
   margin-bottom: 0;
-  -moz-margin-start: 3px;
+  margin-inline-start: 3px;
   padding: 1px;
   left: 0;
   top: 0;
@@ -530,7 +530,7 @@ html[dir=rtl] .iq-resizable-se {
 #exit-button {
   width: 18px;
   height: 18px;
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   margin-top: 2px;
   background-image: -moz-image-rect(url(chrome://browser/skin/tabview/tabview.png), 0, 90, 18, 72);
   background-attachment: scroll;
@@ -570,15 +570,15 @@ html[dir=rtl] .iq-resizable-se {
 #searchbox{
   width: 270px;
   max-width: -moz-available;
-  -moz-margin-start: 20px;
+  margin-inline-start: 20px;
   height: 30px;
   box-shadow: 0px 1px 0px rgba(255,255,255,.5), 0px -1px 0px rgba(0,0,0,1), 0px 0px 9px rgba(0,0,0,.8);
   color: white;
   border: none;
   background-color: #272727;
   border-radius: 0.4em;
-  -moz-padding-start: 5px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 5px;
+  padding-inline-end: 5px;
   font-size: 14px;
 }
 
@@ -613,7 +613,7 @@ html[dir=rtl] #actions {
   width: 20px;
   height: 20px;
   margin-top: 3px;
-  -moz-margin-end: 1px;
+  margin-inline-end: 1px;
 }
 
 .notMainMatch{
@@ -637,8 +637,8 @@ html[dir=rtl] #otherresults {
 #otherresults .label {
   color: #999;
   line-height: 30px;
-  -moz-margin-start: 5px;
-  -moz-margin-end: 5px;
+  margin-inline-start: 5px;
+  margin-inline-end: 5px;
 }
 
 .inlineMatch {
@@ -646,10 +646,10 @@ html[dir=rtl] #otherresults {
   border-radius: 0.4em;
   box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
   border: 1px solid rgba(255, 255, 255, 0.5);
-  -moz-padding-start: 3px;
-  -moz-padding-end: 3px;
+  padding-inline-start: 3px;
+  padding-inline-end: 3px;
   height: 20px;
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
   cursor: pointer;
 }
 
@@ -658,7 +658,7 @@ html[dir=rtl] #otherresults {
 }
 
 .inlineMatch > img {
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
   position: relative;
   top: 2px;
   width: 16px;
diff --git a/src/chrome/global/about.css b/src/chrome/global/about.css
index ee481cc..6a1aa7e 100644
--- a/src/chrome/global/about.css
+++ b/src/chrome/global/about.css
@@ -13,7 +13,7 @@ body {
   border: 1px solid rgb(50,50,50);
   border-radius: 10px;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   background: rgb(43,43,43);
 }
 
@@ -33,7 +33,7 @@ img {
 
 ul {
   margin: 0;
-  -moz-margin-start: 1.5em;
+  margin-inline-start: 1.5em;
   padding: 0;
   list-style: square;
 }
diff --git a/src/chrome/global/autocomplete.css b/src/chrome/global/autocomplete.css
index 01d932e..a6ee94f 100644
--- a/src/chrome/global/autocomplete.css
+++ b/src/chrome/global/autocomplete.css
@@ -82,7 +82,7 @@ panel[type="private-autocomplete-richlistbox"],
 
 .autocomplete-treebody::-moz-tree-cell-text,
 .private-autocomplete-treebody::-moz-tree-cell-text {
-  -moz-padding-start: 8px;
+  padding-inline-start: 8px;
 }
 
 treechildren.autocomplete-treebody::-moz-tree-row(selected),
@@ -137,8 +137,8 @@ treechildren.private-autocomplete-treebody::-moz-tree-cell-text(selected) {
 .ac-type-icon {
   width: 16px; 
   height: 16px;
-  -moz-margin-start: 6px;
-  -moz-margin-end: 4px;
+  margin-inline-start: 6px;
+  margin-inline-end: 4px;
   margin-bottom: -1px;
 }
 
diff --git a/src/chrome/global/button.css b/src/chrome/global/button.css
index 3211770..27ab50f 100644
--- a/src/chrome/global/button.css
+++ b/src/chrome/global/button.css
@@ -29,8 +29,8 @@ button {
   border: 1px solid transparent;
   padding-top: 1px;
   padding-bottom: 2px;
-  -moz-padding-start: 3px;
-  -moz-padding-end: 4px;
+  padding-inline-start: 3px;
+  padding-inline-end: 4px;
 }
 
 .button-text {
@@ -82,8 +82,8 @@ button[open="true"] > .button-box:-moz-system-metric(windows-classic),
 button[checked="true"] > .button-box:-moz-system-metric(windows-classic) {
   padding-top: 2px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 3px;
+  padding-inline-start: 4px;
+  padding-inline-end: 3px;
 }
 
 /* .......... disabled state .......... */
@@ -100,8 +100,8 @@ button[disabled="true"] {
 button[disabled="true"] > .button-box {
   padding-top: 1px !important;
   padding-bottom: 2px !important;
-  -moz-padding-start: 3px !important;
-  -moz-padding-end: 4px !important;
+  padding-inline-start: 3px !important;
+  padding-inline-end: 4px !important;
 }
 
 /* ::::: menu/menu-button buttons ::::: */
@@ -124,8 +124,8 @@ button[type="menu-button"] {
 .button-menubutton-dropmarker[open="true"] {
   margin-top: 2px;
   margin-bottom: 0px;
-  -moz-margin-start: 2px;
-  -moz-margin-end: 0px;
+  margin-inline-start: 2px;
+  margin-inline-end: 0px;
 }
 
 /* ::::: plain buttons ::::: */
diff --git a/src/chrome/global/checkbox.css b/src/chrome/global/checkbox.css
index 9ba0b85..706a506 100644
--- a/src/chrome/global/checkbox.css
+++ b/src/chrome/global/checkbox.css
@@ -16,18 +16,18 @@ checkbox {
   margin: 2px 4px;
   padding-top: 1px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
 }
 
 .checkbox-label-box {
-  -moz-margin-start: 2px;
+  margin-inline-start: 2px;
   border: 1px solid transparent;
   padding: 0px 1px;
 }
 
 .checkbox-icon {
-  -moz-margin-end: 2px;
+  margin-inline-end: 2px;
 }
 
 .checkbox-label {
diff --git a/src/chrome/global/commonDialog.css b/src/chrome/global/commonDialog.css
index bf1538d..979c56a 100644
--- a/src/chrome/global/commonDialog.css
+++ b/src/chrome/global/commonDialog.css
@@ -3,8 +3,8 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #filler {
-  -moz-margin-start: -8px;
-  -moz-margin-end: -10px;
+  margin-inline-start: -8px;
+  margin-inline-end: -10px;
   margin-inline-start: -8px;
   margin-inline-end: -10px;
 }
diff --git a/src/chrome/global/config.css b/src/chrome/global/config.css
index c8fb5a9..cfc3a90 100644
--- a/src/chrome/global/config.css
+++ b/src/chrome/global/config.css
@@ -6,8 +6,8 @@
   font-size: 15px;
   padding-top: 0;
   padding-bottom: 0;
-  -moz-padding-start: calc(48px + 4.6em);
-  -moz-padding-end: 48px;
+  padding-inline-start: calc(48px + 4.6em);
+  padding-inline-end: 48px;
   padding-inline-start: calc(48px + 4.6em);
   padding-inline-end: 48px;
 }
@@ -34,7 +34,7 @@
 
 #filterRow {
   margin-top: 4px;
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
   margin-inline-start: 4px;
 }
 
diff --git a/src/chrome/global/console/console.css b/src/chrome/global/console/console.css
index 4c844cb..620a563 100644
--- a/src/chrome/global/console/console.css
+++ b/src/chrome/global/console/console.css
@@ -26,7 +26,7 @@
 
 .console-row-icon {
   padding: 4px;
-  -moz-padding-start: 5px;
+  padding-inline-start: 5px;
   -moz-box-align: start !important;
 }
 
@@ -52,8 +52,8 @@
 .console-row-code {
   padding-top: 3px;
   padding-bottom: 3px;
-  -moz-padding-start: 3px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 3px;
+  padding-inline-end: 0px;
   color: #0000BB;
   font-size: larger;
 }
@@ -122,8 +122,8 @@
 #ButtonEval {
   margin-top: 2px !important;
   margin-bottom: 2px !important;
-  -moz-margin-start: 0px !important;
-  -moz-margin-end: 2px !important;
+  margin-inline-start: 0px !important;
+  margin-inline-end: 2px !important;
 }
 
 toolbarseparator {
@@ -147,8 +147,8 @@ toolbarseparator {
 toolbar#ToolbarMode toolbarbutton:active,
 toolbar#ToolbarMode toolbarbutton[checked="true"] {
   background-color: rgb(110,110,110);
-  -moz-padding-start: 5px !important;
-  -moz-padding-end: 3px !important;
+  padding-inline-start: 5px !important;
+  padding-inline-end: 3px !important;
 }
 
 
@@ -212,13 +212,13 @@ toolbar#ToolbarMode .toolbarbutton-icon {
 }
 
 toolbar#ToolbarMode .toolbarbutton-text {
-  -moz-padding-end: 4px;
+  padding-inline-end: 4px;
 }
 
 
 /* ::::: Fix Error Console toolbar button text spacing ::::: */
 
 .toolbarbutton-text {
-  -moz-padding-start: 0px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 0px;
+  padding-inline-end: 5px;
 }
diff --git a/src/chrome/global/datetimepicker.css b/src/chrome/global/datetimepicker.css
index 1fdd066..8a7df24 100644
--- a/src/chrome/global/datetimepicker.css
+++ b/src/chrome/global/datetimepicker.css
@@ -20,11 +20,11 @@ datepicker, timepicker {
 .datetimepicker-input-box {
   -moz-appearance: none;
   cursor: text;
-  -moz-margin-end: 2px;
+  margin-inline-end: 2px;
   border: 1px solid rgb(50,50,50);
   padding: 2px 0 3px 0;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
   background-color: rgb(75,75,75);
   color: #fff;
 }
diff --git a/src/chrome/global/dialog.css b/src/chrome/global/dialog.css
index e0d854a..8db8573 100644
--- a/src/chrome/global/dialog.css
+++ b/src/chrome/global/dialog.css
@@ -13,8 +13,8 @@
 dialog { 
   padding-top: 8px;
   padding-bottom: 10px;
-  -moz-padding-start: 8px;
-  -moz-padding-end: 10px;
+  padding-inline-start: 8px;
+  padding-inline-end: 10px;
 }
 
 /* ::::: dialog buttons ::::: */
@@ -46,16 +46,16 @@ dialogheader {
   -moz-box-orient: vertical;
   margin-top: -8px;
   margin-bottom: 0;
-  -moz-margin-start: -8px;
-  -moz-margin-end: -10px;
+  margin-inline-start: -8px;
+  margin-inline-end: -10px;
   border-left: none;
   border-right: none;
   border-top: none;
   border-bottom-color: rgb(50,50,50);
   padding-top: 12px;
   padding-bottom: 12px;
-  -moz-padding-start: 25px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 25px;
+  padding-inline-end: 5px;
   background-color: rgb(43,43,43);
   color: #fff;
 }
@@ -66,5 +66,5 @@ dialogheader {
 }
 
 .header-large > .dialogheader-description {
-  -moz-margin-start: 12px !important;
+  margin-inline-start: 12px !important;
 }
diff --git a/src/chrome/global/dirListing/dirListing.css b/src/chrome/global/dirListing/dirListing.css
index 49bdcbb..1e74ae9 100644
--- a/src/chrome/global/dirListing/dirListing.css
+++ b/src/chrome/global/dirListing/dirListing.css
@@ -90,12 +90,12 @@ td:not(:first-child) {
 
 .up {
   padding: 0 .5em;
-  -moz-margin-start: 20px;
+  margin-inline-start: 20px;
 }
 
 .up::before {
-  -moz-margin-end: 4px;
-  -moz-margin-start: -20px;
+  margin-inline-end: 4px;
+  margin-inline-start: -20px;
   vertical-align: middle;
   content: url(chrome://global/skin/dirListing/up.png);
 }
diff --git a/src/chrome/global/dropmarker.css b/src/chrome/global/dropmarker.css
index d4ae282..042af78 100644
--- a/src/chrome/global/dropmarker.css
+++ b/src/chrome/global/dropmarker.css
@@ -22,8 +22,8 @@ dropmarker:hover:active:not([disabled="true"]) {
   background-color: rgb(110,110,110);
   padding-top: 2px;
   padding-bottom: 0px;
-  -moz-padding-start: 2px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 2px;
+  padding-inline-end: 0px;
   padding-inline-start: 2px;
   padding-inline-end: 0px;
 }
diff --git a/src/chrome/global/expander.css b/src/chrome/global/expander.css
index 6c7d290..92cb18d 100644
--- a/src/chrome/global/expander.css
+++ b/src/chrome/global/expander.css
@@ -9,6 +9,6 @@
 .settingsContainer {
   padding-top: 3px;
   padding-bottom: 5px;
-  -moz-padding-start: 20px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 20px;
+  padding-inline-end: 5px;
 }
diff --git a/src/chrome/global/filefield.css b/src/chrome/global/filefield.css
index 462476c..755f4d3 100644
--- a/src/chrome/global/filefield.css
+++ b/src/chrome/global/filefield.css
@@ -28,8 +28,8 @@ filefield {
   height: 16px;
   margin-top: 1px;
   margin-bottom: 1px;
-  -moz-margin-start: 1px;
-  -moz-margin-end: 4px;
+  margin-inline-start: 1px;
+  margin-inline-end: 4px;
 }
 
 .fileFieldLabel {
diff --git a/src/chrome/global/findBar.css b/src/chrome/global/findBar.css
index 6bfe333..fbd2212 100644
--- a/src/chrome/global/findBar.css
+++ b/src/chrome/global/findBar.css
@@ -30,7 +30,7 @@ findbar[hidden] {
 }
 
 .findbar-container {
-  -moz-padding-start: 0px;
+  padding-inline-start: 0px;
   padding-top: 0px;
   padding-bottom: 0px;
 }
@@ -86,7 +86,7 @@ findbar[hidden] {
   border: 1px solid rgb(75,75,75);
   list-style-image: url("chrome://global/skin/icons/find-arrows.png");
   padding: 2px 6px;
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   margin-left: 3px;
   border-radius: 3px;
 }
@@ -102,7 +102,7 @@ findbar[hidden] {
 
 .findbar-find-next {
   -moz-image-region: rect(0, 20px, 9px, 10px);
-  -moz-padding-end: 6px;
+  padding-inline-end: 6px;
 }
 
 .findbar-find-previous > .toolbarbutton-icon,
@@ -134,7 +134,7 @@ findbar[hidden] {
 
 .findbar-highlight,
 .findbar-case-sensitive {
-  -moz-margin-start: 5px;
+  margin-inline-start: 5px;
   border-radius: 5px;
 }
 
@@ -146,7 +146,7 @@ findbar[hidden] {
 .findbar-find-status {
   color: GrayText;
   margin: 0 !important;
-  -moz-margin-start: 12px !important;
+  margin-inline-start: 12px !important;
 }
 
 .find-status-icon[status="pending"] {
diff --git a/src/chrome/global/global.css b/src/chrome/global/global.css
index c092ec0..b9eb8c4 100644
--- a/src/chrome/global/global.css
+++ b/src/chrome/global/global.css
@@ -43,8 +43,8 @@ prefwindow {
 window.dialog {
   padding-top: 8px;
   padding-bottom: 10px;
-  -moz-padding-start: 8px;
-  -moz-padding-end: 10px;
+  padding-inline-start: 8px;
+  padding-inline-end: 10px;
 }
 
 /* ::::: alert icons :::::*/
@@ -110,7 +110,7 @@ statusbarpanel:not(.statusbar-resizerpanel):-moz-lwtheme {
   -moz-appearance: none;
   border-top-style: none;
   border-bottom-style: none;
-  -moz-border-start-style: none;
+  border-inline-start-style: none;
 }
 
 .statusbar-resizerpanel {
@@ -138,7 +138,7 @@ sidebarheader {
 }
 
 sidebarheader > label {
-  -moz-padding-start: 4px;
+  padding-inline-start: 4px;
 }
 
 .toolbar-focustarget {
@@ -229,8 +229,8 @@ label {
   cursor: default;
   margin-top: 1px;
   margin-bottom: 2px;
-  -moz-margin-start: 6px;
-  -moz-margin-end: 5px;
+  margin-inline-start: 6px;
+  margin-inline-end: 5px;
 }
 
 description {
@@ -259,7 +259,7 @@ label[disabled="true"]:-moz-system-metric(windows-classic) {
 }
 
 .indent {
-  -moz-margin-start: 23px;
+  margin-inline-start: 23px;
 }
 
 .box-padded {
diff --git a/src/chrome/global/in-content/common.css b/src/chrome/global/in-content/common.css
index d20ce48..c0fbf34 100644
--- a/src/chrome/global/in-content/common.css
+++ b/src/chrome/global/in-content/common.css
@@ -94,7 +94,7 @@ xul|caption > xul|label {
 }
 
 xul|description {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 
@@ -107,9 +107,9 @@ xul|description {
   background-color: var(--in-content-main-background-color);
   background-image: var(--in-content-main-background-image);
   padding-top: 25px;
-  -moz-padding-end: 44px; /* compensate the 4px margin of child elements */
+  padding-inline-end: 44px; /* compensate the 4px margin of child elements */
   padding-bottom: 40px;
-  -moz-padding-start: 48px;
+  padding-inline-start: 48px;
   overflow: auto;
 }
 
@@ -123,15 +123,15 @@ xul|groupbox {
   -moz-appearance: none;
   border: none;
   margin: 15px 0 0;
-  -moz-padding-start: 0;
-  -moz-padding-end: 0;
+  padding-inline-start: 0;
+  padding-inline-end: 0;
   font-size: 1.25rem;
 }
 
 xul|groupbox xul|label {
   /* !important needed to override toolkit !important rule */
-  -moz-margin-start: 0 !important;
-  -moz-margin-end: 0 !important;
+  margin-inline-start: 0 !important;
+  margin-inline-end: 0 !important;
 }
 
 /* tabpanels and tabs */
@@ -149,7 +149,7 @@ xul|tabpanels {
 xul|tabs {
   position:relative;
   margin: 8px 0 15px;
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   border: 0;
   border-bottom: 1px solid #c1c1c1;
 }
@@ -163,7 +163,7 @@ xul|tab {
   -moz-appearance: none;
   position: relative;
   margin-top: 0;
-  -moz-margin-end: -1px;
+  margin-inline-end: -1px;
   padding: 4px 20px;
   min-height: 44px;
   max-height: 45px;
@@ -177,14 +177,14 @@ xul|tab {
               border-color 150ms ease 0s;
 }
 xul|tab:last-of-type{
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 xul|tab::before{
   display: block;
   margin: calc(.5em - 4px);
-  -moz-margin-start: -21px;
-  -moz-margin-end: 20px;
+  margin-inline-start: -21px;
+  margin-inline-end: 20px;
   height: calc(44px - 1em);
   border-right: 1px solid #c1c1c1;
   transition: border-color 150ms ease 0s;
@@ -326,13 +326,13 @@ xul|menulist > xul|*.menulist-label-box {
 }
 
 xul|menulist > xul|*.menulist-label-box > xul|*.menulist-icon[src] {
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 
 xul|button[type="menu"] > xul|*.button-box > xul|*.button-menu-dropmarker {
   -moz-appearance: none;
   margin: 1px 0;
-  -moz-margin-start: 10px;
+  margin-inline-start: 10px;
   padding: 0;
   width: 10px;
   height: 16px;
@@ -343,7 +343,7 @@ xul|button[type="menu"] > xul|*.button-box > xul|*.button-menu-dropmarker {
 
 xul|*.help-button {
   min-width: 16px;
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
   border-width: 0;
   background-image: none;
   /* Override default button background */
@@ -410,7 +410,7 @@ script[src$="preferences.js"] ~ stack  *|button.help-button {
   height: auto;
   min-height: unset;
   margin: -1px;
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 /* Reposition the help buttom from the bottom to the top of the options page  --johnGraciliano */
@@ -428,8 +428,8 @@ script[src$="preferences.js"] ~ stack  .main-content > hbox:last-child {
 
 xul|*.spinbuttons-button {
   min-height: initial;
-  -moz-margin-start: 10px !important;
-  -moz-margin-end: 2px !important;
+  margin-inline-start: 10px !important;
+  margin-inline-end: 2px !important;
 }
 
 xul|*.spinbuttons-up {
@@ -464,7 +464,7 @@ xul|*.spinbuttons-down[disabled="true"] > xul|*.button-box > xul|*.button-icon {
 
 xul|menulist:not([editable="true"]) > xul|*.menulist-dropmarker {
   -moz-appearance: none;
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   padding: 0;
   border: none;
   background-color: transparent;
@@ -497,8 +497,8 @@ xul|button[type="menu"] > xul|menupopup xul|menuitem {
   color: var(--in-content-text-color);
   padding-top: 0.2em;
   padding-bottom: 0.2em;
-  -moz-padding-start: 10px;
-  -moz-padding-end: 30px;
+  padding-inline-start: 10px;
+  padding-inline-end: 30px;
 }
 
 xul|menulist > xul|menupopup > xul|menu[_moz-menuactive="true"],
@@ -622,7 +622,7 @@ html|input[type="checkbox"] + html|label {
 }
 
 xul|checkbox {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 xul|*.checkbox-check,
@@ -633,7 +633,7 @@ html|input[type="checkbox"] + html|label:before {
   height: 23px;
   border-radius: 2px;
   border: 1px solid var(--in-content-box-border-color);
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
   background: initial !important;  /* !important needed to override toolkit checked !important rule */
 }
 
@@ -656,8 +656,8 @@ html|input[type="checkbox"]:disabled + html|label {
 }
 
 xul|*.checkbox-label-box {
-  -moz-margin-start: -1px; /* negative margin for the transparent border */
-  -moz-padding-start: 0;
+  margin-inline-start: -1px; /* negative margin for the transparent border */
+  padding-inline-start: 0;
 }
 
 xul|richlistitem > xul|*.checkbox-check {
@@ -665,7 +665,7 @@ xul|richlistitem > xul|*.checkbox-check {
 }
 
 xul|radio {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 xul|*.radio-check {
@@ -674,7 +674,7 @@ xul|*.radio-check {
   height: 23px;
   border: 1px solid var(--in-content-box-border-color);
   border-radius: 50%;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
   background: initial;
 }
 
@@ -691,9 +691,9 @@ xul|radio[disabled="true"] > xul|*.radio-check {
 }
 
 xul|*.radio-label-box {
-  -moz-margin-start: -1px; /* negative margin for the transparent border */
-  -moz-margin-end: 10px;
-  -moz-padding-start: 0;
+  margin-inline-start: -1px; /* negative margin for the transparent border */
+  margin-inline-end: 10px;
+  padding-inline-start: 0;
 }
 
 /* Category List */
@@ -704,8 +704,8 @@ xul|*.radio-label-box {
   z-index: 1;
   background-color: transparent;
   margin: 0;
-  -moz-margin-start: 4px;
-  -moz-margin-end: -1px;
+  margin-inline-start: 4px;
+  margin-inline-end: -1px;
   margin-top: 74px;
   margin-bottom: 7px;
   border-width: 0;
@@ -716,8 +716,8 @@ xul|*.radio-label-box {
   box-sizing: border-box;
   background-color: transparent;
   color: #fff;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 27px;
+  padding-inline-start: 4px;
+  padding-inline-end: 27px;
   border: 1px solid transparent;
   min-height: 0;
   height: 52px;
@@ -745,12 +745,12 @@ html|*.category.selected,
 *|*.category[selected] {
   background-color: rgb(110,110,110);
   border-color: var(--in-content-main-border-color);
-  -moz-border-end-color: rgb(75,75,75);
+  border-inline-end-color: rgb(75,75,75);
 }
 
 *|*#categories[keyboard-navigation="true"]:-moz-focusring > xul|*.category[current] {
   border: 1px #999 dotted;
-  -moz-border-end: 1px solid rgb(75,75,75);
+  border-inline-end: 1px solid rgb(75,75,75);
 }
 
 *|*.category-name {
@@ -758,7 +758,7 @@ html|*.category.selected,
   font-size: 1.5rem;
   padding: 0;
   margin: 1px 5px 2px;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
   -moz-user-select: none;
   white-space: nowrap;
   text-overflow: ellipsis;
@@ -773,14 +773,14 @@ html|*.category.selected,
 *|*.category-icon {
   width: 32px;
   height: 32px;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
 }
 
 /* header */
 
 *|*.header {
   border-bottom: 1px solid var(--in-content-header-border-color);
-  -moz-margin-end: 4px; /* add the 4px end-margin of other elements */
+  margin-inline-end: 4px; /* add the 4px end-margin of other elements */
   margin-bottom: 15px;
   padding-bottom: 15px;
   -moz-box-align: baseline;
@@ -798,7 +798,7 @@ html|*.category.selected,
 script[src$="preferences.js"] ~ stack .header{
   border: none;
   margin: -10px 0 -7px;
-  -moz-margin-end: 4px; /* add the 4px end-margin of other elements */
+  margin-inline-end: 4px; /* add the 4px end-margin of other elements */
   padding-bottom: 0;
 }
 script[src$="preferences.js"] ~ stack .header-name{
@@ -822,13 +822,13 @@ xul|*.fileFieldContentBox {
 }
 
 xul|*.fileFieldIcon {
-  -moz-margin-start: 10px;
-  -moz-margin-end: 0;
+  margin-inline-start: 10px;
+  margin-inline-end: 0;
 }
 
 xul|*.fileFieldLabel {
-  -moz-margin-start: -26px;
-  -moz-padding-start: 36px;
+  margin-inline-start: -26px;
+  padding-inline-start: 36px;
 }
 
 /* List boxes */
@@ -836,7 +836,7 @@ xul|*.fileFieldLabel {
 xul|richlistbox,
 xul|listbox {
   -moz-appearance: none;
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   background-color: var(--in-content-box-background);
   border: 1px solid var(--in-content-box-border-color);
   color: var(--in-content-text-color);
@@ -901,8 +901,8 @@ xul|treecolpicker:hover {
 
 xul|treecol:not([hideheader="true"]):not(:first-child),
 xul|treecolpicker {
-  -moz-border-start-width: 1px;
-  -moz-border-start-style: solid;
+  border-inline-start-width: 1px;
+  border-inline-start-style: solid;
   border-image: linear-gradient(transparent 0%, transparent 20%, #c1c1c1 20%, #c1c1c1 80%, transparent 80%, transparent 100%) 1 1;
 }
 
@@ -946,13 +946,13 @@ xul|treechildren::-moz-tree-cell-text(selected) {
 
   /* The start margin should get clear at the beginning of a line */
   hbox > xul|button:first-child {
-    -moz-margin-start: 0;
+    margin-inline-start: 0;
     margin-inline-start: 0;
   }
   /* Not in this special cases */
   hbox > vbox > hbox > xul|button:first-child,
   :-moz-any(row, hbox) > hbox > xul|button:first-child {
-    -moz-margin-start: 4px;
+    margin-inline-start: 4px;
     margin-inline-start: 4px;
   }
 
@@ -962,7 +962,7 @@ xul|treechildren::-moz-tree-cell-text(selected) {
   }
 
   xul|checkbox {
-    -moz-padding-start: 0;
+    padding-inline-start: 0;
   }
 
   @media not all and (-moz-windows-default-theme) {
@@ -978,7 +978,7 @@ xul|treechildren::-moz-tree-cell-text(selected) {
 
   xul|radio {
     -moz-binding: url("chrome://global/content/bindings/radio.xml#radio");
-    -moz-padding-start: 0;
+    padding-inline-start: 0;
   }
 
   @media not all and (-moz-windows-default-theme) {
@@ -994,7 +994,7 @@ xul|treechildren::-moz-tree-cell-text(selected) {
 
   xul|*.radio-icon,
   xul|*.checkbox-icon {
-    -moz-margin-end: 0;
+    margin-inline-end: 0;
   }
 
   /* Never draw a border for the focusring, use outline instead */
@@ -1058,18 +1058,18 @@ xul|treechildren::-moz-tree-cell-text(selected) {
 
   /* The start margin should get clear at the beginning of a line */
   hbox > xul|button:first-child {
-    -moz-margin-start: 0;
+    margin-inline-start: 0;
     margin-inline-start: 0;
   }
   /* Not in this special cases */
   hbox > vbox > hbox > xul|button:first-child,
   :-moz-any(row, hbox) > hbox > xul|button:first-child {
-    -moz-margin-start: 4px;
+    margin-inline-start: 4px;
     margin-inline-start: 4px;
   }
 
   xul|caption {
-    -moz-padding-start: 0;
+    padding-inline-start: 0;
   }
 
   xul|groupbox > xul|*.groupbox-body {
@@ -1091,11 +1091,11 @@ xul|treechildren::-moz-tree-cell-text(selected) {
   xul|menulist > xul|menupopup xul|menuitem,
   xul|button[type="menu"] > xul|menupopup xul|menu,
   xul|button[type="menu"] > xul|menupopup xul|menuitem {
-    -moz-padding-end: 34px;
+    padding-inline-end: 34px;
   }
 
   xul|*.help-button > xul|*.button-box > xul|*.button-icon {
-    -moz-margin-start: 0;
+    margin-inline-start: 0;
   }
 
   xul|*.checkbox-icon {
@@ -1103,7 +1103,7 @@ xul|treechildren::-moz-tree-cell-text(selected) {
   }
 
   xul|*.radio-icon {
-    -moz-margin-end: 0;
+    margin-inline-end: 0;
   }
 
   xul|*.numberbox-input-box {
diff --git a/src/chrome/global/in-content/info-pages.css b/src/chrome/global/in-content/info-pages.css
index ef84e2d..433a246 100644
--- a/src/chrome/global/in-content/info-pages.css
+++ b/src/chrome/global/in-content/info-pages.css
@@ -7,8 +7,8 @@ body {
   min-height: 100vh;
   padding-top: 0;
   padding-bottom: 0;
-  -moz-padding-start: calc(48px + 4.6em);
-  -moz-padding-end: 48px;
+  padding-inline-start: calc(48px + 4.6em);
+  padding-inline-end: 48px;
   padding-inline-start: calc(48px + 4.6em);
   padding-inline-end: 48px;
   align-items: center;
@@ -40,8 +40,8 @@ body > .container > h1:not(:empty) /* This is for  about:about  */
   background-position: left 0;
   background-repeat: no-repeat;
   background-size: 1.6em;
-  -moz-margin-start: -2.3em;
-  -moz-padding-start: 2.3em;
+  margin-inline-start: -2.3em;
+  padding-inline-start: 2.3em;
   margin-inline-start: -2.3em;
   padding-inline-start: 2.3em;
   font-size: 2.5em;
@@ -68,8 +68,8 @@ body > .container > h1:not(:empty) /* This is for  about:about  */
 
   .title {
     background-image: none !important;
-    -moz-padding-start: 0;
-    -moz-margin-start: 0;
+    padding-inline-start: 0;
+    margin-inline-start: 0;
     padding-inline-start: 0;
     margin-inline-start: 0;
   }
@@ -82,7 +82,7 @@ body > .container > h1:not(:empty) /* This is for  about:about  */
 ul, ol {
   margin: 0;
   padding: 0;
-  -moz-margin-start: 1em;
+  margin-inline-start: 1em;
   margin-inline-start: 1em;
 }
 
@@ -119,7 +119,7 @@ ul.columns {
 }
 
 .button-container > button:first-child {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   margin-inline-start: 0;
 }
 
diff --git a/src/chrome/global/inContentUI.css b/src/chrome/global/inContentUI.css
index 5c60d97..23ca3e0 100644
--- a/src/chrome/global/inContentUI.css
+++ b/src/chrome/global/inContentUI.css
@@ -88,7 +88,7 @@ html|html {
   }
 
   menulist {
-    -moz-padding-end: 0;
+    padding-inline-end: 0;
   }
 
   colorpicker[type="button"]:-moz-focusring:not([open="true"]) > .colorpicker-button-colorbox {
diff --git a/src/chrome/global/listbox.css b/src/chrome/global/listbox.css
index 355d5b6..7b62b1a 100644
--- a/src/chrome/global/listbox.css
+++ b/src/chrome/global/listbox.css
@@ -58,12 +58,12 @@ listheader[sortable="true"]:hover:active {
   border: 1px solid rgb(60,60,60);
   padding-top: 1px;
   padding-bottom: 0px;
-  -moz-padding-start: 5px;
-  -moz-padding-end: 4px;
+  padding-inline-start: 5px;
+  padding-inline-end: 4px;
 }
 
 .listheader-icon {
-  -moz-margin-end: 2px;
+  margin-inline-end: 2px;
 }
 
 .listheader-label {
@@ -98,13 +98,13 @@ listheader[sortable="true"]:hover:active {
   margin: 0px !important;
   padding-top: 0px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 4px;
+  padding-inline-end: 0px;
   white-space: nowrap;
 }
 
 .listcell-icon {
-  -moz-margin-end: 2px;
+  margin-inline-end: 2px;
 }
 
 .listcell-label[disabled="true"] {
@@ -119,8 +119,8 @@ listheader[sortable="true"]:hover:active {
   margin: 2px 4px;
   padding-top: 1px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
   border: 1px solid;
   -moz-border-top-colors: rgb(75,75,75);
   -moz-border-right-colors: rgb(75,75,75);
diff --git a/src/chrome/global/media/videocontrols.css b/src/chrome/global/media/videocontrols.css
index 6907620..9ea4de6 100644
--- a/src/chrome/global/media/videocontrols.css
+++ b/src/chrome/global/media/videocontrols.css
@@ -127,7 +127,7 @@
   overflow: hidden;
   margin: 0;
   padding: 2px 10px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
   border: none;
   color: rgba(255,255,255,.5);
   background-color: rgba(35,31,32,.74);
diff --git a/src/chrome/global/netError.css b/src/chrome/global/netError.css
index 5d02b67..ce8e623 100644
--- a/src/chrome/global/netError.css
+++ b/src/chrome/global/netError.css
@@ -26,7 +26,7 @@ h1 {
 
 ul, ol {
   margin: 0;
-  -moz-margin-start: 1.5em;
+  margin-inline-start: 1.5em;
   padding: 0;
 }
 
@@ -46,7 +46,7 @@ ul {
   border: 1px solid rgb(50,50,50);
   border-radius: 10px;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   background: url("chrome://global/skin/icons/warning-large.png") left 0 no-repeat  rgb(43,43,43);
   background-origin: content-box;
 }
@@ -60,11 +60,11 @@ body[dir="rtl"] #errorPageContainer {
 }
 
 #errorTitle {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 #errorLongContent {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 #errorShortDesc > p {
@@ -76,7 +76,7 @@ body[dir="rtl"] #errorPageContainer {
 }
 
 #errorLongDesc {
-  -moz-padding-end: 3em;
+  padding-inline-end: 3em;
   font-size: 110%;
 }
 
@@ -85,14 +85,14 @@ body[dir="rtl"] #errorPageContainer {
 
 #errorTryAgain {
   margin-top: 2em;
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 #brand {
   position: absolute;
   right: 0;
   bottom: -1.5em;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
   opacity: .4;
 }
 
diff --git a/src/chrome/global/notification.css b/src/chrome/global/notification.css
index 83030d1..e6efe06 100644
--- a/src/chrome/global/notification.css
+++ b/src/chrome/global/notification.css
@@ -28,8 +28,8 @@ notification[type="critical"] {
 .messageImage {
   width: 16px;
   height: 16px;
-  -moz-margin-start: 6px;
-  -moz-margin-end: 1px;
+  margin-inline-start: 6px;
+  margin-inline-end: 1px;
 }
 
 /* Default icons for notifications */
@@ -53,7 +53,7 @@ notification[type="critical"] {
 }
 
 .messageCloseButton > .toolbarbutton-icon {
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 
 /* Popup notification */
@@ -96,13 +96,13 @@ notification[type="critical"] {
 .popup-notification-menubutton > .button-menubutton-button {
   background-color: transparent;
   padding: 1px;
-  -moz-border-end: none;
+  border-inline-end: none;
 }
 
 .popup-notification-menubutton:not([type="menu-button"]),
 .popup-notification-menubutton > .button-menubutton-button > .button-box {
-  -moz-padding-start: 8px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 8px;
+  padding-inline-end: 5px;
 }
 
 .popup-notification-menubutton > .button-menubutton-dropmarker {
@@ -145,6 +145,6 @@ notification[type="critical"] {
 }
 
 .popup-notification-closebutton {
-  -moz-margin-end: -14px;
+  margin-inline-end: -14px;
   margin-top: -10px;
 }
diff --git a/src/chrome/global/passwordmgr.css b/src/chrome/global/passwordmgr.css
index 809a9c5..5708289 100644
--- a/src/chrome/global/passwordmgr.css
+++ b/src/chrome/global/passwordmgr.css
@@ -16,7 +16,7 @@ treechildren::-moz-tree-image(siteCol) {
   list-style-image: url(chrome://browser/skin/places/place.svg#defaultFavicon);
   width: 16px;
   height: 16px;
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
   margin-inline-end: 5px;
 }
 
diff --git a/src/chrome/global/preferences.css b/src/chrome/global/preferences.css
index 8ec8ac3..1e6ddad 100644
--- a/src/chrome/global/preferences.css
+++ b/src/chrome/global/preferences.css
@@ -17,15 +17,15 @@ prefwindow {
 prefpane {
   padding-top: 8px;
   padding-bottom: 10px;
-  -moz-padding-start: 8px;
-  -moz-padding-end: 10px;
+  padding-inline-start: 8px;
+  padding-inline-end: 10px;
 }
 
 prefwindow[type="child"] {
   padding-top: 8px;
   padding-bottom: 10px;
-  -moz-padding-start: 8px;
-  -moz-padding-end: 10px;
+  padding-inline-start: 8px;
+  padding-inline-end: 10px;
 }
 
 prefwindow[type="child"] > prefpane {
@@ -34,8 +34,8 @@ prefwindow[type="child"] > prefpane {
 
 .prefWindow-dlgbuttons {
   padding-bottom: 10px;
-  -moz-padding-start: 8px;
-  -moz-padding-end: 10px;
+  padding-inline-start: 8px;
+  padding-inline-end: 10px;
 }
 
 prefwindow[type="child"] .prefWindow-dlgbuttons {
@@ -52,7 +52,7 @@ radio[pane] {
 .paneSelector {
   border-bottom: 1px solid rgb(75,75,75);
   margin: 0px;
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
   background-color: rgb(43,43,43);
   color: #fff;
 }
diff --git a/src/chrome/global/printPreview.css b/src/chrome/global/printPreview.css
index da234b0..b1a6eec 100644
--- a/src/chrome/global/printPreview.css
+++ b/src/chrome/global/printPreview.css
@@ -10,7 +10,7 @@
 
 .navigate-button > .toolbarbutton-icon {
   /* display: none; |* This is in the default theme.  Here the icons are shown instead of the labels --johnGraciliano */
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
   margin-inline-end: 0;
 }
 .navigate-button > .toolbarbutton-text {
diff --git a/src/chrome/global/scrollbox.css b/src/chrome/global/scrollbox.css
index 47e7141..b44e8d7 100644
--- a/src/chrome/global/scrollbox.css
+++ b/src/chrome/global/scrollbox.css
@@ -80,8 +80,8 @@ autorepeatbutton,
   -moz-box-pack: center;
   margin-top: 1px;
   margin-bottom: 2px;
-  -moz-margin-start: 1px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 1px;
+  margin-inline-end: 2px;
 }
 
 autorepeatbutton {
@@ -95,6 +95,6 @@ autorepeatbutton:not([disabled="true"]):hover:active {
   border: 1px inset rgb(75,75,75);
   padding-top: 2px;
   padding-bottom: 1px;
-  -moz-padding-start: 2px;
-  -moz-padding-end: 1px;
+  padding-inline-start: 2px;
+  padding-inline-end: 1px;
 }
diff --git a/src/chrome/global/textbox.css b/src/chrome/global/textbox.css
index 2912d56..0dd8866 100644
--- a/src/chrome/global/textbox.css
+++ b/src/chrome/global/textbox.css
@@ -21,7 +21,7 @@ textbox {
   margin: 2px 4px;
   border: 1px solid rgb(50,50,50);
   padding: 2px 2px 3px;
-  -moz-padding-start: 4px;
+  padding-inline-start: 4px;
   background-color: rgb(75,75,75);
   color: #fff;
 }
diff --git a/src/chrome/global/toolbar.css b/src/chrome/global/toolbar.css
index 3544def..e78b7eb 100644
--- a/src/chrome/global/toolbar.css
+++ b/src/chrome/global/toolbar.css
@@ -30,8 +30,8 @@ toolbarpaletteitem[place="toolbar"] > toolbarspacer {
 .toolbarpaletteitem-box[type="spring"][place="toolbar"] {
   margin-top: 2px;
   margin-bottom: 2px;
-  -moz-margin-start: 0px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 0px;
+  margin-inline-end: 2px;
 }
 
 .toolbarpaletteitem-box[type="separator"][place="palette"] {
diff --git a/src/chrome/global/tree.css b/src/chrome/global/tree.css
index 88bdfc3..8a01e1d 100644
--- a/src/chrome/global/tree.css
+++ b/src/chrome/global/tree.css
@@ -174,7 +174,7 @@ treechildren::-moz-tree-drop-feedback {
   background-color: rgb(110,110,110);
   width: 50px;
   height: 2px;
-  -moz-margin-start: 5px;
+  margin-inline-start: 5px;
 }
 
 /* ::::: tree progress meter ::::: */
@@ -250,11 +250,11 @@ treecol[insertbefore="true"]:-moz-locale-dir(ltr) {
 }
 
 treechildren::-moz-tree-column(insertbefore) {
-  -moz-border-start: 1px solid ThreeDShadow;
+  border-inline-start: 1px solid ThreeDShadow;
 }
 
 treechildren::-moz-tree-column(insertafter) {
-  -moz-border-end: 1px solid ThreeDShadow;
+  border-inline-end: 1px solid ThreeDShadow;
 }
 
 /* ::::: sort direction indicator :::::  */
@@ -288,7 +288,7 @@ treecol:not([hideheader="true"]) > .treecol-sortdirection[sortDirection="descend
 /* ::::: twisty :::::  */
 
 treechildren::-moz-tree-twisty {
-  -moz-padding-end: 4px;
+  padding-inline-end: 4px;
   padding-top: 1px;
   width: 9px; /* The image's width is 9 pixels */
   list-style-image: url("chrome://global/skin/tree/twisty.svg#clsd");
@@ -332,7 +332,7 @@ treechildren::-moz-tree-cell-text(selected, editing) {
   -moz-border-left-colors: Highlight;
   -moz-border-right-colors: Highlight;
   margin: 0;
-  -moz-margin-start: -4px;
+  margin-inline-start: -4px;
   padding: 1px;
 }
 
@@ -343,7 +343,7 @@ treechildren::-moz-tree-indentation {
 }
 
 treechildren::-moz-tree-twisty {
-  -moz-padding-end: 1px;
+  padding-inline-end: 1px;
   width: 9px;
 }
 
diff --git a/src/chrome/global/wizard.css b/src/chrome/global/wizard.css
index 60b8648..f0215e3 100644
--- a/src/chrome/global/wizard.css
+++ b/src/chrome/global/wizard.css
@@ -15,17 +15,17 @@ wizard[description=""] .wizard-header-description {
 }
 
 .wizard-header-label {
-  -moz-margin-start: 23px;
+  margin-inline-start: 23px;
   font-weight: bold;
 }
 
 .wizard-header-description {
-  -moz-margin-start: 44px;
+  margin-inline-start: 44px;
 }
 
 wizard[branded="true"] .wizard-header-icon {
   list-style-image: url("chrome://branding/content/icon48.png");
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 
 .wizard-page-box {
@@ -42,9 +42,9 @@ wizard[branded="true"] .wizard-header-icon {
 
 .wizard-button[dlgtype="finish"],
 .wizard-button[dlgtype="next"] {
-  -moz-margin-start: 0px !important;
+  margin-inline-start: 0px !important;
 }
 
 .wizard-button[dlgtype="back"] {
-  -moz-margin-end: 0px !important;
+  margin-inline-end: 0px !important;
 }
diff --git a/src/chrome/mozapps/aboutNetworking.css b/src/chrome/mozapps/aboutNetworking.css
index 5c1acef..b97b0f1 100644
--- a/src/chrome/mozapps/aboutNetworking.css
+++ b/src/chrome/mozapps/aboutNetworking.css
@@ -100,7 +100,7 @@ body {
 #refreshDiv{
   font-size: 1.1rem;
   margin: 0 0 13px;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
 }
 #refreshButton{
   line-height: unset;
diff --git a/src/chrome/mozapps/aboutProfiles.css b/src/chrome/mozapps/aboutProfiles.css
index 24107b0..e071968 100644
--- a/src/chrome/mozapps/aboutProfiles.css
+++ b/src/chrome/mozapps/aboutProfiles.css
@@ -27,8 +27,8 @@ body {
 }
 
 button {
-  -moz-margin-start: 0;
-  -moz-margin-end: 8px;
+  margin-inline-start: 0;
+  margin-inline-end: 8px;
 }
 
 table {
@@ -65,7 +65,7 @@ td {
 
 th:not(:last-child),
 td:not(:last-child){
-  -moz-border-end-width: 1px;
+  border-inline-end-width: 1px;
   border-inline-end-width: 1px;
 }
 
@@ -94,8 +94,8 @@ table button {
   float: right;
   margin-top: 2em;
   margin-bottom: 20px;
-  -moz-margin-start: 20px;
-  -moz-margin-end: 0;
+  margin-inline-start: 20px;
+  margin-inline-end: 0;
   padding: 16px;
   width: 30%;
 }
diff --git a/src/chrome/mozapps/aboutServiceWorkers.css b/src/chrome/mozapps/aboutServiceWorkers.css
index b6f8f5e..43fd4d7 100644
--- a/src/chrome/mozapps/aboutServiceWorkers.css
+++ b/src/chrome/mozapps/aboutServiceWorkers.css
@@ -29,7 +29,7 @@ body {
   border: 1px solid rgb(50,50,50);
   border-radius: 10px;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   background: rgb(43,43,43);
   margin-left: auto;
   text-align: center;
diff --git a/src/chrome/mozapps/downloads/downloads.css b/src/chrome/mozapps/downloads/downloads.css
index 8cfae8c..f4a18c9 100644
--- a/src/chrome/mozapps/downloads/downloads.css
+++ b/src/chrome/mozapps/downloads/downloads.css
@@ -127,12 +127,12 @@ windowdragbox {
 }
 
 #clearListButton {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   margin-bottom: 0;
 }
 
 #searchbox {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
   margin-bottom: 0;
   background-color: rgb(50,50,50);
   border-radius: 5px;
diff --git a/src/chrome/mozapps/downloads/unknownContentType.css b/src/chrome/mozapps/downloads/unknownContentType.css
index c6dba24..0682146 100644
--- a/src/chrome/mozapps/downloads/unknownContentType.css
+++ b/src/chrome/mozapps/downloads/unknownContentType.css
@@ -16,16 +16,16 @@
   width: 16px;
   margin-top: 0px;
   margin-bottom: 0px;
-  -moz-margin-start: 0px;
-  -moz-margin-end: 5px;
+  margin-inline-start: 0px;
+  margin-inline-end: 5px;
 }
 
 .small-indent {
-  -moz-margin-start: 15px; 
-  -moz-margin-end: 15px;
+  margin-inline-start: 15px; 
+  margin-inline-end: 15px;
 }
 
 .small-indent label {
-  -moz-margin-start: 0px; 
+  margin-inline-start: 0px; 
 }
 
diff --git a/src/chrome/mozapps/extensions/about.css b/src/chrome/mozapps/extensions/about.css
index c2078bc..52802be 100644
--- a/src/chrome/mozapps/extensions/about.css
+++ b/src/chrome/mozapps/extensions/about.css
@@ -23,7 +23,7 @@
   list-style-image: url("chrome://mozapps/skin/extensions/extensionGeneric.png");
   max-width: 64px;
   max-height: 64px;
-  -moz-margin-end: 6px;
+  margin-inline-end: 6px;
 }
 
 #genericAbout[addontype="theme"] #extensionIcon {
@@ -65,7 +65,7 @@
 }
 
 .boxIndent {
-  -moz-margin-start: 18px;
+  margin-inline-start: 18px;
 }
 
 #extensionCreator, .contributor {
diff --git a/src/chrome/mozapps/extensions/blocklist.css b/src/chrome/mozapps/extensions/blocklist.css
index da92102..1cdbb35 100644
--- a/src/chrome/mozapps/extensions/blocklist.css
+++ b/src/chrome/mozapps/extensions/blocklist.css
@@ -5,8 +5,8 @@
 richlistitem {
   padding-top: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 7px;
-  -moz-padding-end: 7px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
   border-bottom: 1px solid #C0C0C0;
 }
 
diff --git a/src/chrome/mozapps/extensions/eula.css b/src/chrome/mozapps/extensions/eula.css
index d39f543..2c76ac4 100644
--- a/src/chrome/mozapps/extensions/eula.css
+++ b/src/chrome/mozapps/extensions/eula.css
@@ -6,7 +6,7 @@
   list-style-image: url("chrome://mozapps/skin/extensions/extensionGeneric.png");
   max-width: 48px;
   max-height: 48px;
-  -moz-margin-end: 6px;
+  margin-inline-end: 6px;
 }
 
 #eula-dialog[addontype="theme"] #icon {
diff --git a/src/chrome/mozapps/extensions/extensions.css b/src/chrome/mozapps/extensions/extensions.css
index 27925dc..c8ef072 100644
--- a/src/chrome/mozapps/extensions/extensions.css
+++ b/src/chrome/mozapps/extensions/extensions.css
@@ -9,7 +9,7 @@
 @import url("chrome://global/skin/inContentUI.css");
 
 #forward-btn {
-  -moz-border-start: none;
+  border-inline-start: none;
 }
 
 #back-btn:-moz-locale-dir(ltr),
@@ -138,7 +138,7 @@
 #categories {
   -moz-appearance: none;
   border: none;
-  -moz-margin-end: -1px;
+  margin-inline-end: -1px;
   background-color: transparent;
   position: relative;
   margin-top: 31px;
@@ -186,7 +186,7 @@
   background-color: rgb(110,110,110);
   color: #fff;
   border-color: rgb(50,50,50);
-  -moz-border-end-color: rgb(75,75,75);
+  border-inline-end-color: rgb(75,75,75);
 }
 
 .category-name {
@@ -217,7 +217,7 @@
 .category-icon {
   width: 32px;
   height: 32px;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
 }
 
 #category-search > .category-icon {
@@ -287,7 +287,7 @@
 
 #header-utils-btn {
   list-style-image: url("chrome://browser/skin/toolbar/menu.svg");
-  -moz-margin-end: 16px;
+  margin-inline-end: 16px;
 }
 
 .view-header {
@@ -329,7 +329,7 @@
 }
 
 .sorter .button-icon {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
 }
 
 
@@ -347,7 +347,7 @@
 
 .discover-logo {
   list-style-image: url("chrome://mozapps/skin/extensions/discover-logo.png");
-  -moz-margin-end: 15px;
+  margin-inline-end: 15px;
 }
 
 .discover-title {
@@ -391,7 +391,7 @@
 .details {
   cursor: pointer;
   margin: 0;
-  -moz-margin-start: 10px;
+  margin-inline-start: 10px;
 }
 
 .icon-container {
@@ -451,7 +451,7 @@
 }
 
 .description-container {
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
   -moz-box-align: center;
 }
 
@@ -462,7 +462,7 @@
 .warning,
 .pending,
 .error {
-  -moz-margin-start: 48px;
+  margin-inline-start: 48px;
   font-weight: bold;
   -moz-box-align: center;
 }
@@ -523,7 +523,7 @@
 
 .addon .relnotes-container {
   -moz-box-align: start;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
   height: 0;
   overflow: hidden;
   opacity: 0;
@@ -553,7 +553,7 @@
 }
 
 .addon .relnotes-toggle > .button-box > .button-icon {
-  -moz-padding-start: 4px;
+  padding-inline-start: 4px;
 }
 
 .addon[show-relnotes] .relnotes-toggle {
@@ -690,12 +690,12 @@
 #detail-notifications .warning,
 #detail-notifications .pending,
 #detail-notifications .error {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 #detail-icon-container {
   width: 64px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
   margin-top: 6px;
 }
 
@@ -713,7 +713,7 @@
 }
 
 #detail-screenshot {
-  -moz-margin-end: 2em;
+  margin-inline-end: 2em;
   max-width: 300px;
   max-height: 300px;
 }
@@ -736,7 +736,7 @@
 }
 
 #detail-desc, #detail-fulldesc {
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
   /* This is necessary to fix layout issues with multi-line descriptions, see
      bug 592712*/
   outline: solid transparent;
@@ -782,7 +782,7 @@
 }
 
 #detail-contrib-btn .button-icon {
-  -moz-margin-end: 3px;
+  margin-inline-end: 3px;
 }
 
 #detail-contrib-btn:not(:active):hover {
@@ -846,7 +846,7 @@ setting {
   font-size: 90.9%;
   color: graytext;
   margin-top: -2px;
-  -moz-margin-start: 2em;
+  margin-inline-start: 2em;
   white-space: pre-wrap;
 }
 
@@ -865,8 +865,8 @@ menulist { /* Fixes some styling inconsistencies */
 /*** creator ***/
 
 .creator > label {
-  -moz-margin-start: 0;
-  -moz-margin-end: 0;
+  margin-inline-start: 0;
+  margin-inline-end: 0;
 }
 
 .creator > .text-link {
@@ -878,7 +878,7 @@ menulist { /* Fixes some styling inconsistencies */
 /*** rating ***/
 
 .meta-rating {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
   padding-top: 2px;
 }
 
@@ -930,13 +930,13 @@ menulist { /* Fixes some styling inconsistencies */
 }
 
 .download-progress .start-cap {
-  -moz-margin-start: -1px;
-  -moz-border-end-width: 0;
+  margin-inline-start: -1px;
+  border-inline-end-width: 0;
 }
 
 .download-progress .end-cap {
-  -moz-margin-end: -1px;
-  -moz-border-start-width: 0px !important;
+  margin-inline-end: -1px;
+  border-inline-start-width: 0px !important;
 }
 
 .download-progress .progress .progress-bar  {
@@ -997,7 +997,7 @@ menulist { /* Fixes some styling inconsistencies */
 }
 
 .download-progress .cancel .button-icon {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 .download-progress .cancel {
diff --git a/src/chrome/mozapps/extensions/newaddon.css b/src/chrome/mozapps/extensions/newaddon.css
index 028c91c..7437590 100644
--- a/src/chrome/mozapps/extensions/newaddon.css
+++ b/src/chrome/mozapps/extensions/newaddon.css
@@ -39,7 +39,7 @@
 }
 
 #icon {
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
   max-width: 64px;
   max-height: 64px;
   list-style-image: url("chrome://mozapps/skin/extensions/extensionGeneric.png");
@@ -82,11 +82,11 @@
   list-style-image: url("chrome://mozapps/skin/extensions/alerticon-warning.png");
   width: 16px;
   height: 15px;
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 
 #allow {
-  -moz-margin-start: 84px;
+  margin-inline-start: 84px;
   margin-bottom: 20px;
 }
 
diff --git a/src/chrome/mozapps/extensions/selectAddons.css b/src/chrome/mozapps/extensions/selectAddons.css
index 70ec9d4..25f226e 100644
--- a/src/chrome/mozapps/extensions/selectAddons.css
+++ b/src/chrome/mozapps/extensions/selectAddons.css
@@ -110,8 +110,8 @@
   margin: 0;
   padding-top: 1px;
   padding-bottom: 2px;
-  -moz-padding-start: 6px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 6px;
+  padding-inline-end: 5px;
 }
 
 #select-grid separator {
@@ -147,7 +147,7 @@
 
 .action-list {
   margin-top: 10px;
-  -moz-margin-start: 5em;
+  margin-inline-start: 5em;
 }
 
 .action-header {
@@ -155,7 +155,7 @@
 }
 
 #confirm .addon {
-  -moz-margin-start: 3em;
+  margin-inline-start: 3em;
   -moz-box-align: center;
 }
 
diff --git a/src/chrome/mozapps/extensions/update.css b/src/chrome/mozapps/extensions/update.css
index d35438a..39a999c 100644
--- a/src/chrome/mozapps/extensions/update.css
+++ b/src/chrome/mozapps/extensions/update.css
@@ -12,8 +12,8 @@
   height: 16px;
   margin-top: 5px;
   margin-bottom: 5px;
-  -moz-margin-start: 5px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 5px;
+  margin-inline-end: 2px;
 }
 
 .alertBox {
diff --git a/src/chrome/mozapps/handling/handling.css b/src/chrome/mozapps/handling/handling.css
index d07bdc9..be14425 100644
--- a/src/chrome/mozapps/handling/handling.css
+++ b/src/chrome/mozapps/handling/handling.css
@@ -9,7 +9,7 @@
 
 richlistitem[type] {
   min-height: 36px; /* Don't forget to update the richlistbox height! */
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
  }
  
 richlistitem {
diff --git a/src/chrome/mozapps/update/updates.css b/src/chrome/mozapps/update/updates.css
index 73dd54c..7dc91ec 100644
--- a/src/chrome/mozapps/update/updates.css
+++ b/src/chrome/mozapps/update/updates.css
@@ -42,8 +42,8 @@ wizardpage {
 }
 
 #licenseContent, #incompatibleListbox {
-  -moz-margin-start: 6px;
-  -moz-margin-end: 6px;
+  margin-inline-start: 6px;
+  margin-inline-end: 6px;
 }
 
 .inline-link {
@@ -57,8 +57,8 @@ wizardpage {
 
 /* Unsupported Page */
 #unsupportedLabel, #unsupportedLinkLabel {
-  -moz-margin-start: 0;
-  -moz-padding-start: 0;
+  margin-inline-start: 0;
+  padding-inline-start: 0;
 }
 
 /* Update Found Basic Page */
@@ -144,8 +144,8 @@ wizardpage {
 #errorReason {
   margin-top: 1px;
   margin-bottom: 2px;
-  -moz-margin-start: 6px !important;
-  -moz-margin-end: 5px;
+  margin-inline-start: 6px !important;
+  margin-inline-end: 5px;
   font-weight: bold;
 }
 
diff --git a/src/chrome/mozapps/xpinstall/xpinstallConfirm.css b/src/chrome/mozapps/xpinstall/xpinstallConfirm.css
index 16abce3..f4539a2 100644
--- a/src/chrome/mozapps/xpinstall/xpinstallConfirm.css
+++ b/src/chrome/mozapps/xpinstall/xpinstallConfirm.css
@@ -16,7 +16,7 @@
 }
 
 #itemWarningIntro {
-  -moz-margin-start: 8px;
+  margin-inline-start: 8px;
 }
 
 #dialogContentBox {
@@ -26,8 +26,8 @@
 installitem {
   padding-top: 5px;
   padding-bottom: 5px;
-  -moz-padding-start: 5px;
-  -moz-padding-end: 0;
+  padding-inline-start: 5px;
+  padding-inline-end: 0;
   border-bottom: 1px dotted rgb(75,75,75);
   margin-bottom: 5px;
 }
@@ -36,7 +36,7 @@ installitem {
   list-style-image: url("chrome://global/skin/icons/warning-large.png");
   width: 48px;
   height: 48px;
-  -moz-margin-end: 20px;
+  margin-inline-end: 20px;
 }
 
 .warning {
@@ -48,7 +48,7 @@ installitem {
 .xpinstallIconContainer {
   width: 32px;
   height: 32px;
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 
 .xpinstallItemName {
@@ -68,8 +68,8 @@ installitem {
   color: #fff;
   margin-top: 1px;
   margin-bottom: 1px;
-  -moz-margin-start: 6px;
-  -moz-margin-end: 5px;
+  margin-inline-start: 6px;
+  margin-inline-end: 5px;
 }
 
 .xpinstallItemIcon {
diff --git a/src/chrome/os/darwin/browser.css b/src/chrome/os/darwin/browser.css
index 5742c3d..f98ed30 100644
--- a/src/chrome/os/darwin/browser.css
+++ b/src/chrome/os/darwin/browser.css
@@ -96,7 +96,7 @@ toolbarbutton.bookmark-item {
 
 toolbarbutton.bookmark-item > menupopup {
   margin-top: 2px;
-  -moz-margin-start: 3px;
+  margin-inline-start: 3px;
 }
 
 .bookmark-item > .toolbarbutton-icon {
@@ -107,5 +107,5 @@ toolbarbutton.bookmark-item > menupopup {
 
 .bookmark-item > .toolbarbutton-icon[label]:not([label=""]),
 .bookmark-item > .toolbarbutton-icon[type="menu"] {
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
diff --git a/src/chrome/os/darwin/menu.css b/src/chrome/os/darwin/menu.css
index b1d35c4..07532c6 100644
--- a/src/chrome/os/darwin/menu.css
+++ b/src/chrome/os/darwin/menu.css
@@ -45,18 +45,18 @@ menucaption > .menu-iconic-text {
 .menu-description {
   font-style: italic;
   color: GrayText;
-  -moz-margin-start: 1ex !important;
+  margin-inline-start: 1ex !important;
 }
 
 .menu-iconic-icon {
   height: 16px;
   margin-top: -2px;
   margin-bottom: -2px;
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
   /* Empty icons shouldn't take up room, so we need to compensate
    * the 5px margin-end with a negative margin-start.
    */
-  -moz-margin-start: -5px;
+  margin-inline-start: -5px;
 }
 
 /* menuitems with icons */
@@ -73,7 +73,7 @@ menuitem[src] {
 .menu-iconic > .menu-iconic-left > .menu-iconic-icon,
 menuitem[image] > .menu-iconic-left > .menu-iconic-icon,
 menuitem[src] > .menu-iconic-left > .menu-iconic-icon {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   width: 16px;
 }
 
@@ -81,16 +81,16 @@ menuitem[src] > .menu-iconic-left > .menu-iconic-icon {
 
 .menu-right,
 .menu-accel-container {
-  -moz-margin-start: 21px;
-  -moz-margin-end: -9px;
+  margin-inline-start: 21px;
+  margin-inline-end: -9px;
   -moz-box-pack: end;
 }
 
 .menu-right {
   margin-top: 0px;
   margin-bottom: 0px;
-  -moz-margin-start: 6px;
-  -moz-margin-end: 0px;
+  margin-inline-start: 6px;
+  margin-inline-end: 0px;
   width: 1ex;
   height: 1ex;
   /* These next two rules are needed to prevent inheritance and thus ugliness */
@@ -181,7 +181,7 @@ menulist:not([editable="true"]) > menupopup > menuitem[selected="true"]::before
   content: '\2713'; /* a checkmark */
   display: block;
   width: 15px;
-  -moz-margin-start: -15px;
+  margin-inline-start: -15px;
 }
 
 /* ::::: menuseparator ::::: */
diff --git a/src/chrome/os/darwin/menulist.css b/src/chrome/os/darwin/menulist.css
index 2b28464..4360e60 100644
--- a/src/chrome/os/darwin/menulist.css
+++ b/src/chrome/os/darwin/menulist.css
@@ -36,7 +36,7 @@ menulist:not([popuponly="true"]) {
 .menulist-description {
   font-style: italic;
   color: GrayText;
-  -moz-margin-start: 1ex !important;
+  margin-inline-start: 1ex !important;
 }
 
 menulist:hover:not(:active):not([disabled=true]) {
@@ -62,7 +62,7 @@ menulist[disabled="true"] {
 }
 
 menulist[disabled="true"] > .menulist-dropmarker {
-  -moz-padding-start: 7px !important;
+  padding-inline-start: 7px !important;
 }
 
 /* ::::: editable menulists ::::: */
diff --git a/src/chrome/os/darwin/notification.css b/src/chrome/os/darwin/notification.css
index ac3e2a7..09109a7 100644
--- a/src/chrome/os/darwin/notification.css
+++ b/src/chrome/os/darwin/notification.css
@@ -26,13 +26,13 @@
 .popup-notification-menubutton > .button-menubutton-button {
   background-color: transparent;
   padding: 1px;
-  -moz-border-end: none;
+  border-inline-end: none;
 }
 
 .popup-notification-menubutton:not([type="menu-button"]),
 .popup-notification-menubutton > .button-menubutton-button > .button-box {
-  -moz-padding-start: 8px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 8px;
+  padding-inline-end: 5px;
 }
 
 .popup-notification-menubutton > .button-menubutton-dropmarker {
@@ -71,6 +71,6 @@
 }
 
 .popup-notification-closebutton {
-  -moz-margin-end: -14px;
+  margin-inline-end: -14px;
   margin-top: -10px;
 }
diff --git a/src/chrome/os/darwin/radio.css b/src/chrome/os/darwin/radio.css
index 4dae50a..102a09e 100644
--- a/src/chrome/os/darwin/radio.css
+++ b/src/chrome/os/darwin/radio.css
@@ -16,12 +16,12 @@ radio {
 }
 
 .radio-label-box {
-  -moz-margin-start: 0px;
+  margin-inline-start: 0px;
   padding: 0px;
 }
 
 .radio-icon {
-  -moz-margin-end: 2px;
+  margin-inline-end: 2px;
 }
 
 .radio-label {
diff --git a/src/chrome/os/darwin/toolbarbutton.css b/src/chrome/os/darwin/toolbarbutton.css
index 6f25999..122bcdd 100644
--- a/src/chrome/os/darwin/toolbarbutton.css
+++ b/src/chrome/os/darwin/toolbarbutton.css
@@ -39,14 +39,14 @@ toolbarbutton[disabled="true"][open="true"] {
   background-color: transparent !important;
   list-style-image: url("chrome://global/skin/arrow/arrow-v.svg#dn");
   padding: 0;
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
   width: auto;
 }
 
 .toolbarbutton-menu-dropmarker[disabled="true"] {
   list-style-image: url("chrome://global/skin/arrow/arrow-v.svg#dn-dis");
   padding: 0;
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 /* ::::: toolbarbutton menu-button ::::: */
diff --git a/src/chrome/os/darwin/tree.css b/src/chrome/os/darwin/tree.css
index fedb4a9..147ec45 100644
--- a/src/chrome/os/darwin/tree.css
+++ b/src/chrome/os/darwin/tree.css
@@ -125,8 +125,8 @@ treecol[hideheader="true"] {
 
 treecol:hover:active,
 treecolpicker:hover:active {
-  -moz-border-start: 2px solid;
-  -moz-border-end: 1px solid;
+  border-inline-start: 2px solid;
+  border-inline-end: 1px solid;
   -moz-border-top-colors: ThreeDDarkShadow ThreeDShadow;
   -moz-border-right-colors: ThreeDDarkShadow;
   -moz-border-bottom-colors: ThreeDDarkShadow;
@@ -148,7 +148,7 @@ treecol[dragging="true"] {
 
 treechildren::-moz-tree-twisty {
   -moz-appearance: treetwisty;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
 }
 
 treechildren::-moz-tree-twisty(open) {
@@ -166,7 +166,7 @@ treechildren::-moz-tree-indentation {
 /* ::::: gridline style ::::: */
 
 treechildren.gridlines::-moz-tree-cell {
-  -moz-border-end: 1px solid GrayText;
+  border-inline-end: 1px solid GrayText;
   border-bottom: 1px solid GrayText;
 }
 
@@ -176,6 +176,6 @@ treechildren.gridlines::-moz-tree-cell {
   border-width: 0;
   box-shadow: 0 0 1px -moz-mac-focusring inset, 0 0 4px 1px -moz-mac-focusring, 0 0 1.5px 1px -moz-mac-focusring;
   margin: 0;
-  -moz-margin-start: -2px;
+  margin-inline-start: -2px;
   padding: 2px 1px 1px;
 }
\ No newline at end of file
diff --git a/src/chrome/os/linux/browser.css b/src/chrome/os/linux/browser.css
index ce152aa..44e54b5 100644
--- a/src/chrome/os/linux/browser.css
+++ b/src/chrome/os/linux/browser.css
@@ -34,8 +34,8 @@ toolbarbutton.bookmark-item:hover:active,
 toolbarbutton.bookmark-item[open="true"] {
   padding-top: 3px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
 }
 
 .bookmark-item > .toolbarbutton-icon {
diff --git a/src/chrome/os/linux/menu.css b/src/chrome/os/linux/menu.css
index 47fc746..23db93d 100644
--- a/src/chrome/os/linux/menu.css
+++ b/src/chrome/os/linux/menu.css
@@ -84,14 +84,14 @@ menulist > menupopup > menu {
 .menu-iconic-text {
   margin-top: 0px !important;
   margin-bottom: 0px !important;
-  -moz-margin-start: 0px !important;
-  -moz-margin-end: 2px !important;
+  margin-inline-start: 0px !important;
+  margin-inline-end: 2px !important;
   color: inherit;
 }
 
 .menu-text {
   /* This is (18 + the size of end-padding on .menu-iconic-left)px */
-  -moz-margin-start: 21px !important;
+  margin-inline-start: 21px !important;
   font-weight: inherit;
 }
 
@@ -104,14 +104,14 @@ menucaption > .menu-iconic-text {
 .menu-description {
   font-style: italic;
   color: GrayText;
-  -moz-margin-start: 1ex !important;
+  margin-inline-start: 1ex !important;
 }
 
 .menu-accel,
 .menu-iconic-accel {
   margin-top: 0px !important;
   margin-bottom: 0px !important;
-  -moz-margin-start: 7px !important;
+  margin-inline-start: 7px !important;
   color: inherit;
 }
 
@@ -123,7 +123,7 @@ menucaption > .menu-iconic-text {
 .menu-iconic-right {
   width: 16px;
   /* We can only hardcode this, to make the default GTK icon<->label spacing */
-  -moz-padding-end: 3px !important;
+  padding-inline-end: 3px !important;
 }
 
 .menu-iconic-icon {
@@ -134,8 +134,8 @@ menucaption > .menu-iconic-text {
 .menu-right {
   margin-top: 0px;
   margin-bottom: 0px;
-  -moz-margin-start: 6px;
-  -moz-margin-end: 0px;
+  margin-inline-start: 6px;
+  margin-inline-end: 0px;
   width: 1ex;
   height: 1ex;
   /* These next two rules are needed to prevent inheritance and thus ugliness */
@@ -151,8 +151,8 @@ menucaption > .menu-iconic-text {
 .menubar-left {
   margin-top: 0px;
   margin-bottom: 0px;
-  -moz-margin-start: 0px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 0px;
+  margin-inline-end: 2px;
   color: inherit;
 }
 
diff --git a/src/chrome/os/linux/menulist.css b/src/chrome/os/linux/menulist.css
index 04cbd7e..4215a66 100644
--- a/src/chrome/os/linux/menulist.css
+++ b/src/chrome/os/linux/menulist.css
@@ -56,7 +56,7 @@ menulist[disabled="true"]:hover:active {
 .menulist-description {
   font-style: italic;
   color: GrayText;
-  -moz-margin-start: 1ex !important;
+  margin-inline-start: 1ex !important;
 }
 
 /* ..... dropmarker ..... */
@@ -74,8 +74,8 @@ menulist[disabled="true"]:hover:active > .menulist-dropmarker {
 menulist:hover:active > .menulist-dropmarker {
   padding-top: 2px;
   padding-bottom: 0px;
-  -moz-padding-start: 2px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 2px;
+  padding-inline-end: 0px;
 }
 
 /* ..... focused state ..... */
@@ -100,8 +100,8 @@ menulist[editable="true"] {
   -moz-appearance: none;
   padding-top: 3px;
   padding-bottom: 3px;
-  -moz-padding-start: 2px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 2px;
+  padding-inline-end: 0px;
   color: #fff;
 }
 
diff --git a/src/chrome/os/linux/radio.css b/src/chrome/os/linux/radio.css
index 3315167..0ffd9f5 100644
--- a/src/chrome/os/linux/radio.css
+++ b/src/chrome/os/linux/radio.css
@@ -16,21 +16,21 @@ radio {
   margin: 2px 4px;
   padding-top: 1px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
 }
 
 .radio-label-box {
-  -moz-margin-start: 2px;
+  margin-inline-start: 2px;
   border: 1px solid transparent;
   padding-top: 0px;
   padding-bottom: 1px;
-  -moz-padding-start: 1px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 1px;
+  padding-inline-end: 0px;
 }
 
 .radio-icon {
-  -moz-margin-end: 2px;
+  margin-inline-end: 2px;
 }
 
 .radio-label {
diff --git a/src/chrome/os/linux/toolbarbutton.css b/src/chrome/os/linux/toolbarbutton.css
index 7c611d3..055e2a8 100644
--- a/src/chrome/os/linux/toolbarbutton.css
+++ b/src/chrome/os/linux/toolbarbutton.css
@@ -25,7 +25,7 @@ toolbarbutton:-moz-lwtheme {
 
 .toolbarbutton-icon[label]:not([label=""]),
 .toolbarbutton-icon[type="menu"] {
-  -moz-margin-end: 2px;
+  margin-inline-end: 2px;
 }
 
 .toolbarbutton-text {
@@ -41,8 +41,8 @@ toolbarbutton:hover:active,
 toolbarbutton[open="true"] {
   padding-top: 4px;
   padding-bottom: 2px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
 }
 
 toolbarbutton[disabled="true"],
diff --git a/src/chrome/os/linux/tree.css b/src/chrome/os/linux/tree.css
index 74889e8..4a75e48 100644
--- a/src/chrome/os/linux/tree.css
+++ b/src/chrome/os/linux/tree.css
@@ -156,13 +156,13 @@ treecolpicker:hover:active {
   -moz-border-left-colors: ThreeDShadow -moz-Dialog;
   padding-top: 0px;
   padding-bottom: 0px;
-  -moz-padding-start: 3px;
-  -moz-padding-end: 1px;
+  padding-inline-start: 3px;
+  padding-inline-end: 1px;
 }
 
 .treecol-image:hover:active {
   padding: 0px;
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 treecol:hover:active .treecol-text {
@@ -188,7 +188,7 @@ treecol[dragging="true"] {
 
 treechildren::-moz-tree-twisty {
   -moz-appearance: treetwisty;
-  -moz-padding-end: 4px;
+  padding-inline-end: 4px;
   padding-top: 1px;
   width: 9px; /* The image's width is 9 pixels */
   list-style-image: url("chrome://global/skin/tree/twisty-clsd.png");
@@ -229,6 +229,6 @@ treechildren::-moz-tree-cell-text(selected, editing) {
   -moz-border-left-colors: Highlight;
   -moz-border-right-colors: Highlight;
   margin: 0;
-  -moz-margin-start: -4px;
+  margin-inline-start: -4px;
   padding: 1px;
 }
\ No newline at end of file
diff --git a/src/chrome/os/winnt/browser.css b/src/chrome/os/winnt/browser.css
index 099ebd2..43018d8 100644
--- a/src/chrome/os/winnt/browser.css
+++ b/src/chrome/os/winnt/browser.css
@@ -63,7 +63,7 @@
   height: auto;
   padding: 0;
   margin: 0;
-  -moz-margin-start: .5em;
+  margin-inline-start: .5em;
 }
 
 #main-window[privatebrowsingmode=temporary] #appmenu-button > .button-box > .button-menu-dropmarker {
@@ -120,7 +120,7 @@
 
 @media not all and (-moz-windows-classic) {
   #titlebar-min {
-    -moz-margin-end: 2px;
+    margin-inline-end: 2px;
   }
 }
 
@@ -135,8 +135,8 @@ toolbarbutton.bookmark-item:hover:active:not([disabled="true"]),
 toolbarbutton.bookmark-item[open="true"] {
   padding-top: 3px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
 }
 
 .bookmark-item:not(#bookmarks-menu-button) > .toolbarbutton-icon {
@@ -170,7 +170,7 @@ toolbarbutton.bookmark-item[open="true"] {
 
   #appmenu-popup {
     margin-top: -1px;
-    -moz-margin-start: 1px;
+    margin-inline-start: 1px;
   }
 }
 
@@ -182,11 +182,11 @@ toolbarbutton.bookmark-item[open="true"] {
 
   #sidebar-splitter {
     border: 0;
-    -moz-border-end: 1px solid rgb(75,75,75);
+    border-inline-end: 1px solid rgb(75,75,75);
     min-width: 0;
     width: 3px;
     background-color: transparent;
-    -moz-margin-start: -3px;
+    margin-inline-start: -3px;
     position: relative;
   }
 }
diff --git a/src/chrome/os/winnt/menu.css b/src/chrome/os/winnt/menu.css
index 7224dd2..9457c7a 100644
--- a/src/chrome/os/winnt/menu.css
+++ b/src/chrome/os/winnt/menu.css
@@ -53,14 +53,14 @@ menuitem.spell-suggestion {
 
 .menu-text {
   -moz-appearance: none;
-  -moz-padding-start: 1.45em !important;
+  padding-inline-start: 1.45em !important;
 }
 
 .menu-text,
 .menu-iconic-text {
   font-weight: inherit;
-  -moz-margin-start: 2px !important;
-  -moz-padding-end: 2px;
+  margin-inline-start: 2px !important;
+  padding-inline-end: 2px;
 }
 
 menucaption > .menu-text,
@@ -72,14 +72,14 @@ menucaption > .menu-iconic-text {
 .menu-description {
   font-style: italic;
   color: GrayText;
-  -moz-margin-start: 1ex !important;
+  margin-inline-start: 1ex !important;
 }
 
 .menu-accel,
 .menu-iconic-accel {
   color: inherit;
-  -moz-margin-start: 0.74em !important;
-  -moz-margin-end: 1.35em !important;
+  margin-inline-start: 0.74em !important;
+  margin-inline-end: 1.35em !important;
 }
 
 .menu-iconic-left {
diff --git a/src/chrome/os/winnt/menulist.css b/src/chrome/os/winnt/menulist.css
index 5f99d09..472e963 100644
--- a/src/chrome/os/winnt/menulist.css
+++ b/src/chrome/os/winnt/menulist.css
@@ -39,15 +39,15 @@ menulist {
 
 .menulist-label {
   margin-top: 0 !important;
-  -moz-margin-end: 0 !important;
+  margin-inline-end: 0 !important;
   margin-bottom: 0 !important;
-  -moz-margin-start: 1px !important;
+  margin-inline-start: 1px !important;
 }
 
 .menulist-description {
   font-style: italic;
   color: GrayText;
-  -moz-margin-start: 1ex !important;
+  margin-inline-start: 1ex !important;
 }
 
 menulist:hover:not(:active):not([disabled=true]) {
@@ -73,8 +73,8 @@ menulist[disabled="true"]:hover:active > .menulist-dropmarker {
 menulist:hover:active > .menulist-dropmarker {
   padding-top: 2px;
   padding-bottom: 0px;
-  -moz-padding-start: 2px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 2px;
+  padding-inline-end: 0px;
 }
 
 /* ..... focused state ..... */
@@ -100,8 +100,8 @@ menulist[disabled="true"] {
 .menulist-editable-box {
   padding-top: 3px;
   padding-bottom: 3px;
-  -moz-padding-start: 2px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 2px;
+  padding-inline-end: 0px;
 }
 
 html|*.menulist-editable-input {
@@ -122,13 +122,13 @@ html|*.menulist-editable-input {
   .menulist-label {
     margin-top: -1px !important;
     margin-bottom: -1px !important;
-    -moz-margin-start: 0 !important;
+    margin-inline-start: 0 !important;
   }
 
   menulist:not([editable="true"]) > .menulist-dropmarker {
     margin-top: -2px;
-    -moz-margin-start: 3px;
-    -moz-margin-end: -3px;
+    margin-inline-start: 3px;
+    margin-inline-end: -3px;
   }
 
   .menulist-icon {
diff --git a/src/chrome/os/winnt/notification.css b/src/chrome/os/winnt/notification.css
index 72fbdeb..e404c20 100644
--- a/src/chrome/os/winnt/notification.css
+++ b/src/chrome/os/winnt/notification.css
@@ -26,13 +26,13 @@
 .popup-notification-menubutton > .button-menubutton-button {
   background-color: transparent;
   padding: 1px;
-  -moz-border-end: none;
+  border-inline-end: none;
 }
 
 .popup-notification-menubutton:not([type="menu-button"]),
 .popup-notification-menubutton > .button-menubutton-button > .button-box {
-  -moz-padding-start: 8px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 8px;
+  padding-inline-end: 5px;
 }
 
 .popup-notification-menubutton > .button-menubutton-dropmarker {
@@ -75,6 +75,6 @@
 }
 
 .popup-notification-closebutton {
-  -moz-margin-end: -14px;
+  margin-inline-end: -14px;
   margin-top: -10px;
 }
diff --git a/src/chrome/os/winnt/popup.css b/src/chrome/os/winnt/popup.css
index d5f946d..8966efd 100644
--- a/src/chrome/os/winnt/popup.css
+++ b/src/chrome/os/winnt/popup.css
@@ -32,7 +32,7 @@ menupopup {
 
 menupopup > menu > menupopup {
  /* align submenus */
-  -moz-margin-start: -3px;
+  margin-inline-start: -3px;
   margin-top: -3px;
 }
 
diff --git a/src/chrome/os/winnt/radio.css b/src/chrome/os/winnt/radio.css
index 3315167..0ffd9f5 100644
--- a/src/chrome/os/winnt/radio.css
+++ b/src/chrome/os/winnt/radio.css
@@ -16,21 +16,21 @@ radio {
   margin: 2px 4px;
   padding-top: 1px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
 }
 
 .radio-label-box {
-  -moz-margin-start: 2px;
+  margin-inline-start: 2px;
   border: 1px solid transparent;
   padding-top: 0px;
   padding-bottom: 1px;
-  -moz-padding-start: 1px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 1px;
+  padding-inline-end: 0px;
 }
 
 .radio-icon {
-  -moz-margin-end: 2px;
+  margin-inline-end: 2px;
 }
 
 .radio-label {
diff --git a/src/chrome/os/winnt/toolbarbutton.css b/src/chrome/os/winnt/toolbarbutton.css
index fc8ab30..9a7b67b 100644
--- a/src/chrome/os/winnt/toolbarbutton.css
+++ b/src/chrome/os/winnt/toolbarbutton.css
@@ -23,7 +23,7 @@ toolbarbutton {
 
 .toolbarbutton-icon[label]:not([label=""]),
 .toolbarbutton-icon[type="menu"] {
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 
 .toolbarbutton-text {
@@ -53,8 +53,8 @@ toolbarbutton[open="true"] {
   border-color: ThreeDShadow ThreeDHighlight ThreeDHighlight ThreeDShadow;
   padding-top: 4px;
   padding-bottom: 2px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
 }
 
 toolbarbutton[disabled="true"] {
@@ -66,8 +66,8 @@ toolbarbutton[checked="true"]:not([disabled="true"]) {
   border-color: ThreeDShadow ThreeDHighlight ThreeDHighlight ThreeDShadow;
   padding-top: 4px;
   padding-bottom: 2px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
   background-color: rgba(255,255,255,0.5);
   color: #fff;
 }
diff --git a/src/chrome/os/winnt/tree.css b/src/chrome/os/winnt/tree.css
index 5c669ae..1445e58 100644
--- a/src/chrome/os/winnt/tree.css
+++ b/src/chrome/os/winnt/tree.css
@@ -167,15 +167,15 @@ treecolpicker:hover:active {
   -moz-border-left-colors: ThreeDShadow -moz-Dialog;
   padding-top: 1px;
   padding-bottom: 0px;
-  -moz-padding-start: 5px;
-  -moz-padding-end: 3px;
+  padding-inline-start: 5px;
+  padding-inline-end: 3px;
 }
 
 .treecol-image:hover:active {
   padding-top: 1px;
   padding-bottom: 0px;
-  -moz-padding-start: 2px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 2px;
+  padding-inline-end: 0px;
 }
 
 /* ::::: column drag and drop styles ::::: */
@@ -212,7 +212,7 @@ treecol:not([hideheader="true"]) > .treecol-sortdirection[sortDirection="descend
 /* ::::: twisty :::::  */
 
 treechildren::-moz-tree-twisty {
-  -moz-padding-end: 4px;
+  padding-inline-end: 4px;
   padding-top: 1px;
   width: 9px; /* The image's width is 9 pixels */
   list-style-image: url("chrome://global/skin/tree/twisty.svg#clsd");
@@ -251,7 +251,7 @@ treechildren::-moz-tree-cell-text(selected, editing) {
   -moz-border-left-colors: Highlight;
   -moz-border-right-colors: Highlight;
   margin: 0;
-  -moz-margin-start: -4px;
+  margin-inline-start: -4px;
   padding: 1px;
 }
 
@@ -262,7 +262,7 @@ treechildren::-moz-tree-indentation {
 }
 
 treechildren::-moz-tree-twisty {
-  -moz-padding-end: 1px;
+  padding-inline-end: 1px;
 }
 
 treechildren::-moz-tree-twisty(hover) {
@@ -359,8 +359,8 @@ treechildren:-moz-locale-dir(rtl)::-moz-tree-twisty(hover, open) {
   treechildren:not(.autocomplete-treebody)::-moz-tree-row {
     height: 1.8em;
     color: -moz-FieldText;
-    -moz-margin-start: 1px;
-    -moz-margin-end: 1px;
+    margin-inline-start: 1px;
+    margin-inline-end: 1px;
     border-width: 1px;
     border-color: transparent;
     background-repeat: no-repeat;