Add display:block to every absolutely positioned element

chrome/Fx65_tabs_on_bottom.css

@@ -20,6 +20,7 @@ linux_gtk_window_control_patch.css
 
 .titlebar-buttonbox-container{
   position: fixed;
+  display: block;
   top: var(--uc-titlebar-padding,0px);
   right:0;
   height: 40px;

chrome/Fx65_tabs_on_bottom_menubar_on_top_patch.css

@@ -6,6 +6,7 @@
 #navigator-toolbox{ margin-top: 29px }
 #toolbar-menubar{
   position: fixed;
+  display: block;
   top: var(--uc-titlebar-padding,0px);
   height: 29px;
   margin-top:1px;

chrome/autohide_menubar.css

@@ -9,6 +9,7 @@
 #toolbar-menubar{
 	--uc-menubar-height: 36px;
 	position: fixed;
+  display: block;
 	width: 100vw; 
 	height: var(--uc-menubar-height);
 	margin-top: calc(8px - var(--uc-menubar-height));

chrome/autohide_toolbox.css

@@ -17,6 +17,7 @@
 
 #navigator-toolbox{
   position: fixed !important;
+  display: block;
   background-color: var(--lwt-accent-color,black);
   transition: transform 82ms 33ms linear, opacity 82ms 33ms linear !important;
   transform-origin: top;

chrome/click_selected_tab_to_focus_urlbar.css

@@ -21,6 +21,7 @@
 /* Invisible capture box behind tabs*/
 :root:not([customizing]) #urlbar::before{
   position: fixed;
+  display: block;
   top: 0;
   left: 0;
   width: calc(100vw - 138px);

chrome/fake_statusbar.css

@@ -14,7 +14,8 @@
  */
 
 #titlebar{
-  position: fixed; 
+  position: fixed;
+  display: block;
   bottom: 0px; 
   height: var(--tab-min-height);
   width: 100vw;
@@ -23,6 +24,7 @@
 
 #TabsToolbar{
   position: fixed;
+  display: block;
   top: 0px;
   width: 100vw;
   padding-left: 30px !important;

chrome/multi-row_tabs_below_content_Fx66+.css

@@ -25,6 +25,7 @@
 
 #nav-bar{
   position: fixed !important;
+  display: block;
   margin-right: 138px;
   margin-left: 30px;
   /* width == 100vw - margins */
@@ -53,6 +54,7 @@ transform: translateY(calc(-4 * var(--toolbarbutton-outer-padding) + 4px))
 #toolbar-menubar{
   height: var(--multirow-toolbar-height);
   position: fixed;
+  display: block;
   top: var(--multirow-top-padding);
   width: 100vw;
   color: var(--lwt-text-color);

chrome/navbar_tabs_oneliner.css

@@ -37,7 +37,7 @@ Window controls will be all wrong without it
 
 /* Rules specific to window controls on right layout */
 @supports -moz-bool-pref("layout.css.osx-font-smoothing.enabled"){
-  .titlebar-buttonbox-container{ position: fixed; left: 0px; z-index: 3; }
+  .titlebar-buttonbox-container{ position: fixed; display: block; left: 0px; z-index: 3; }
 }
 
 /* 1px margin on touch density causes tabs to be too high */

chrome/navbar_tabs_oneliner_menu_buttons_on_right.css

@@ -34,7 +34,7 @@ Window controls will be all wrong without it
 #nav-bar-customization-target{ margin-right: calc(100vw - (var(--uc-navigationbar-width)) - var(--uc-window-control-width) - var(--uc-buttons-width) - var(--uc-window-drag-space-width)) }
 
 @supports -moz-bool-pref("layout.css.osx-font-smoothing.enabled"){
-  .titlebar-buttonbox-container{ position: fixed; left: 0px; z-index: 3; }
+  .titlebar-buttonbox-container{ position: fixed; display: blocK; left: 0px; z-index: 3; }
   #nav-bar-customization-target{ margin-right: calc(100vw - (var(--uc-navigationbar-width)) - var(--uc-buttons-width) - var(--uc-window-drag-space-width)) }
 }
 

chrome/navbar_tabs_responsive_oneliner.css

@@ -36,7 +36,7 @@ Window controls will be all wrong without it
 
   /* Rules specific to window controls on right layout */
   @supports -moz-bool-pref("layout.css.osx-font-smoothing.enabled"){
-    .titlebar-buttonbox-container{ position: fixed; left: 0px; z-index: 3; }
+    .titlebar-buttonbox-container{ position: fixed; display: block; left: 0px; z-index: 3; }
   }
 
   /* 1px margin on touch density causes tabs to be too high */

chrome/overlay_menubar.css

@@ -2,6 +2,7 @@
 
 #toolbar-menubar{
   position: fixed;
+  display: block;
   top: 0;
   width: 100vw;
   height: initial !important;

chrome/tabs_animated_gradient_border.css

@@ -13,7 +13,7 @@ Thanks to /u/skenera on reddit for suggesting animating background position and
 
 #TabsToolbar::before{
   content: "";
-  display: -moz-box;
+  display: block;
   position: absolute;
   width: 200vw;
   height: calc(var(--tab-min-height) + 2px);

chrome/tabs_below_content.css

@@ -11,6 +11,7 @@ linux_gtk_window_control_patch.css
 
 .titlebar-buttonbox-container{
   position: fixed;
+  display: block;
   top:0;
   right:0;
   height: 40px;
@@ -37,7 +38,7 @@ linux_gtk_window_control_patch.css
 /* Move tabs below content */
 :root:not([inDOMFullscreen]) #content-deck,
 :root:not([inDOMFullscreen]) > #browser{ margin-bottom: var(--tab-min-height) }
-#TabsToolbar{ position: fixed; bottom: 0px; width: 100vw; height: var(--tab-min-height) }
+#TabsToolbar{ position: fixed; display: block; bottom: 0px; width: 100vw; height: var(--tab-min-height) }
 #TabsToolbar-customization-target{ width: 100vw; }
 
 /* Hide stuff that doesn't make sense with tabs below content */

chrome/vertical_menubar.css

@@ -6,6 +6,7 @@
 
 :root:not([customizing]) #titlebar{
   position: fixed;
+  display: block;
   -moz-appearance: none !important;
   right: 0px; 
   height: 100vh;
@@ -15,6 +16,7 @@
 
 #TabsToolbar:not([customizing]){
   position: fixed;
+  display: block;
   top: 0px;
   left: 0px;
   width: 100vw;