Bug 1376413 - Color the titlebar in customize mode on macOS. r=dao

MozReview-Commit-ID: HwKOADqGlIu

--HG--
extra : rebase_source : 12e542f3fa1fe346f722a757dc8b5f8340321620

browser/themes/osx/browser.css

@@ -1570,7 +1570,7 @@ toolbarbutton.chevron > .toolbarbutton-menu-dropmarker {
 }
 
 %ifdef MOZ_PHOTON_THEME
-:root:-moz-any([inFullscreen], [tabsintitlebar]):not([customizing]) #TabsToolbar:not(:-moz-lwtheme) {
+:root:-moz-any([inFullscreen], [tabsintitlebar]) #TabsToolbar:not(:-moz-lwtheme) {
   -moz-appearance: none;
   background-color: #232323;
   color: hsl(240, 9%, 98%);