--- a/browser/themes/osx/browser.css
+++ b/browser/themes/osx/browser.css
@@ -1565,17 +1565,17 @@ toolbarbutton.chevron > .toolbarbutton-m
 }
 
 #TabsToolbar:not(:-moz-lwtheme) {
   color: #333;
   text-shadow: @loweredShadow@;
 }
 
 %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%);
   text-shadow: none;
 }
 %endif
 
 %ifndef MOZ_PHOTON_THEME