Merge branch 'master' of https://github.com/MrOtherGuy/firefox-csshacks

chrome/multi-row_tabs.css

@@ -28,7 +28,6 @@ See the above repository for updates as well as full license text. */
 }
 
 @-moz-document url(chrome://browser/content/browser.xhtml){
-  
   #scrollbutton-up~spacer,
   #scrollbutton-up,
   #scrollbutton-down{ display: var(--scrollbutton-display-model,initial) }
@@ -73,7 +72,11 @@ See the above repository for updates as well as full license text. */
 /* remove bottom margin so it doesn't throw off row height computation */
 #tabs-newtab-button{ margin-bottom: 0 !important; }
 
+#tabbrowser-tabs[hasadjacentnewtabbutton][overflow="true"] > #tabbrowser-arrowscrollbox > #tabbrowser-arrowscrollbox-periphery > #tabs-newtab-button {
+  display: -moz-box !important;
+}
+
 #alltabs-button,
 :root:not([customizing]) #TabsToolbar #new-tab-button,
 #tabbrowser-arrowscrollbox > spacer,
-.tabbrowser-tab::after{ display: none !important }
+.tabbrowser-tab::after{ display: none !important }

chrome/vertical_bookmarks_toolbar.css

@@ -39,10 +39,10 @@ See the above repository for updates as well as full license text. */
   #PersonalToolbar #PlacesToolbarItems > .bookmark-item{ padding-block: 4px !important; }
   
 
-  body > #browser,
-  body > #browser-bottombox,
-  #customization-container{
+:root:not([chromehidden~="toolbar"]) body > #browser,
+:root:not([chromehidden~="toolbar"]) body > #browser-bottombox,
+:root:not([chromehidden~="toolbar"]) #customization-container{
     margin-left: var(--uc-vertical-toolbar-width,0);
   }
 
-}
+}