diff --git a/chrome/combined_favicon_and_tab_close_button.css b/chrome/combined_favicon_and_tab_close_button.css
index cd544e1..b042e62 100644
--- a/chrome/combined_favicon_and_tab_close_button.css
+++ b/chrome/combined_favicon_and_tab_close_button.css
@@ -14,7 +14,6 @@ See the above repository for updates as well as full license text. */
   visibility: hidden;
 }
 .tab-close-button{
-  -moz-box-ordinal-group: 0; /* Firefox <112 compatibility */
   order: -1;
   display: flex !important;
   position: relative;
diff --git a/chrome/combined_tabs_and_main_toolbars.css b/chrome/combined_tabs_and_main_toolbars.css
index 3eb9755..271770f 100644
--- a/chrome/combined_tabs_and_main_toolbars.css
+++ b/chrome/combined_tabs_and_main_toolbars.css
@@ -25,7 +25,7 @@ See the above repository for updates as well as full license text. */
   @media (-moz-platform: windows-win10){
     :root[tabsintitlebar="true"] #nav-bar{ padding-left: calc(var(--uc-hide-window-control-space,1) * 134px + 20px) !important; }
   }
-  #toolbar-menubar[autohide="true"] + #TabsToolbar .titlebar-buttonbox{ -moz-box-direction: reverse; flex-direction: row-reverse }
+  #toolbar-menubar[autohide="true"] + #TabsToolbar .titlebar-buttonbox{ flex-direction: row-reverse }
 }
 
 #navigator-toolbox{ --tab-min-height: 40px }
diff --git a/chrome/curved_tabs.css b/chrome/curved_tabs.css
index a2e02b9..2b01d82 100644
--- a/chrome/curved_tabs.css
+++ b/chrome/curved_tabs.css
@@ -97,7 +97,6 @@ See the above repository for updates as well as full license text. */
 .tab-background[selected]{ border: 1px solid var(--lwt-tabs-border-color) !important; border-bottom: none !important }
 
 .tab-context-line{
-  -moz-box-ordinal-group: 2;
   margin-block: 0 !important;
 }
 
@@ -153,7 +152,7 @@ See the above repository for updates as well as full license text. */
 
 /* OPTIONAL - uncomment the following to flip the curves vertically - maybe useful for tabs on bottom ? */
 @supports -moz-bool-pref("userchrome.curved_tabs.flipped-curve.enabled"){
-  .tab-background{ -moz-box-direction: reverse; flex-direction: column-reverse }
+  .tab-background{ flex-direction: column-reverse }
   .tabbrowser-tab:hover > .tab-stack > .tab-background,
   .tab-background[selected]{ border-radius: 0 0 var(--uc-tab-curve-size) var(--uc-tab-curve-size) !important }
   .tabbrowser-tab > .tab-stack::before{ transform: scaleY(-1) !important; }
diff --git a/chrome/floating_findbar_on_top.css b/chrome/floating_findbar_on_top.css
index 2bd0412..0001bd6 100644
--- a/chrome/floating_findbar_on_top.css
+++ b/chrome/floating_findbar_on_top.css
@@ -77,7 +77,6 @@ findbar::after{
     flex-direction: row-reverse;
   }
   findbar > .findbar-container{
-    -moz-box-direction: reverse;
     flex-direction: row-reverse;
     border-inline-width: 1px 0px;
     border-bottom-right-radius: 0px;
diff --git a/chrome/hide_tabs_toolbar_w_alltabs_button.css b/chrome/hide_tabs_toolbar_w_alltabs_button.css
index 9ad6beb..a11bbab 100644
--- a/chrome/hide_tabs_toolbar_w_alltabs_button.css
+++ b/chrome/hide_tabs_toolbar_w_alltabs_button.css
@@ -7,7 +7,6 @@ See the above repository for updates as well as full license text. */
 
 #tabbrowser-tabs{ visibility: hidden }
 #TabsToolbar-customization-target{
-  -moz-box-pack: end;
   justify-content: flex-end;
 }
 #alltabs-button{
diff --git a/chrome/linux_gtk_window_control_patch.css b/chrome/linux_gtk_window_control_patch.css
index b9f84d0..b018f58 100644
--- a/chrome/linux_gtk_window_control_patch.css
+++ b/chrome/linux_gtk_window_control_patch.css
@@ -12,7 +12,6 @@ See the above repository for updates as well as full license text. */
   -moz-context-properties: fill, stroke, fill-opacity;
   fill: currentColor;
   padding: 4px 6px !important;
-  -moz-box-flex: 1;
   flex-grow: 1;
   overflow: -moz-hidden-unscrollable;
 }
diff --git a/chrome/menubar_in_tabs_toolbar.css b/chrome/menubar_in_tabs_toolbar.css
index 4b835e4..af6b9ab 100644
--- a/chrome/menubar_in_tabs_toolbar.css
+++ b/chrome/menubar_in_tabs_toolbar.css
@@ -2,14 +2,12 @@
 See the above repository for updates as well as full license text. */
 
 :root:not([customizing]) #titlebar{
-  -moz-box-orient: horizontal; /* Fx <112 compatibility */
   flex-direction: row;
 }
 #toolbar-menubar > .titlebar-buttonbox-container,
 #toolbar-menubar > spacer{ display: none; }
 
 #main-menubar{
-  -moz-box-flex: 1; /* Fx <112 compatibility */
   flex-grow: 1 !important;
 }
 :root:not([customizing]) #toolbar-menubar[autohide][inactive]{ max-width: 0 }
diff --git a/chrome/shrinking_pinned_tabs.css b/chrome/shrinking_pinned_tabs.css
index 564873c..1b808d6 100644
--- a/chrome/shrinking_pinned_tabs.css
+++ b/chrome/shrinking_pinned_tabs.css
@@ -5,7 +5,6 @@ See the above repository for updates as well as full license text. */
 
 #tabbrowser-arrowscrollbox:not([overflowing]) .tabbrowser-tab[pinned] {
   flex-grow: 10;
-  -moz-box-flex: 10;
   max-width: 40px;
 }
 
diff --git a/chrome/status_inside_urlbar.css b/chrome/status_inside_urlbar.css
index 570c556..82d921c 100644
--- a/chrome/status_inside_urlbar.css
+++ b/chrome/status_inside_urlbar.css
@@ -107,7 +107,6 @@ As a workaround, the -moz-element background image is removed somewhat often whi
 /*
 #statuspanel-label{
   text-align: center;
-  -moz-box-pack: center;
   justify-content: center;
 }
 .urlbar-input-box::after{ background-position-x: center !important; }
diff --git a/chrome/status_inside_urlbar_v2.css b/chrome/status_inside_urlbar_v2.css
index 6ff2175..c46d150 100644
--- a/chrome/status_inside_urlbar_v2.css
+++ b/chrome/status_inside_urlbar_v2.css
@@ -72,7 +72,6 @@ As a workaround, the -moz-element background image is removed somewhat often whi
 /*
 #statuspanel-label{
   text-align: center;
-  -moz-box-pack: center;
   justify-content: center;
 }
 .urlbar-input-box::after{ background-position-x: center !important; }
diff --git a/chrome/textual_context_navigation.css b/chrome/textual_context_navigation.css
index dbfe4c2..11fe6a7 100644
--- a/chrome/textual_context_navigation.css
+++ b/chrome/textual_context_navigation.css
@@ -3,12 +3,11 @@ See the above repository for updates as well as full license text. */
 
 /* Makes constext navigation buttons appears as normal textual menuitems */
 
-#context-navigation{ -moz-box-orient: vertical; flex-direction: column !important; }
+#context-navigation{ flex-direction: column !important; }
 #context-navigation > menuitem > .menu-iconic-left{ display: none }
 #context-navigation > menuitem{
   padding-block: 0.5em;
   padding-inline-start: 1em;
-  -moz-box-pack: start !important;
   justify-content: start !important;
   width: auto !important;
 }
diff --git a/chrome/vertical_bookmarks_toolbar.css b/chrome/vertical_bookmarks_toolbar.css
index c16d3d7..5aed4f9 100644
--- a/chrome/vertical_bookmarks_toolbar.css
+++ b/chrome/vertical_bookmarks_toolbar.css
@@ -38,7 +38,6 @@ See the above repository for updates as well as full license text. */
   
   #PlacesToolbar,
   #PlacesToolbarDropIndicatorHolder{
-    -moz-box-orient: vertical !important; /* Can be removed with Firefox 112 */
     flex-direction: column;
   }
   
diff --git a/chrome/vertical_context_navigation.css b/chrome/vertical_context_navigation.css
index dd85e37..60010b1 100644
--- a/chrome/vertical_context_navigation.css
+++ b/chrome/vertical_context_navigation.css
@@ -23,7 +23,6 @@ scrollbox[orient="vertical"]::before{
 #contentAreaContextMenu menu{ --uc-popup-display: } /* intentionally blank */
 
 #context-navigation{
-  -moz-box-orient: vertical;
   flex-direction: column !important;
   grid-area: 1 / 1 / auto / 1;
   min-width: unset !important;
diff --git a/chrome/vertical_menubar.css b/chrome/vertical_menubar.css
index 80394da..cd6aff3 100644
--- a/chrome/vertical_menubar.css
+++ b/chrome/vertical_menubar.css
@@ -41,7 +41,6 @@ See the above repository for updates as well as full license text. */
   #toolbar-menubar:not([customizing]){
     margin-top: 40px; /* This needs to be bigger if bookmarks toolbar is shown */
     width: var(--uc-vertical-menubar-width);
-    -moz-box-orient: vertical;
     flex-direction: column;
     flex-grow: 1;
     background-color: var(--lwt-accent-color);
@@ -56,7 +55,6 @@ See the above repository for updates as well as full license text. */
   #toolbar-menubar > #menubar-items:hover{ visibility: visible }
 
   #toolbar-menubar:not([customizing]) #main-menubar{
-    -moz-box-orient: vertical;
     flex-direction: column;
     margin-left: -40px;
     background-color: var(--lwt-accent-color);