remaining -moz-box-x cleanup

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 }