Running 132B3 the speaker icon besides the favicon to indicate playback in the tab is missing ever since updating to 132 first (see attached image). On 131 it was a speaker icon which you could use to mute/unmute tabs which showed up when audio or video was playing. Compact density, title bar and menu bar is enabled along with Simple white by Moomin-theme and an added userChrome.css which can be seen here: https://pastebin.com/cLt2bSnR Along with a few changed preferences in about:config but those probably won't matter in this case? Guess it's missing additional stuff in userChrome.css to get it working as before again? Or were the icons pulled from Firefox itself so the problem is accessing/referencing to them in the first place, hence why it's an empty circle now? On Reddit a hover override from https://support.mozilla.org/en-US/questions/1338919 was suggested but adding that didn't change the icons' behaviour unfortunately. Hovering over with the mouse cursor manually just fills out the circle with black. Any help in the matter is appreciated, best regards! Edit - Solved it with the help of another user, had to replace parts of the original .css with an override from another thread (https://support.mozilla.org/ml/questions/1338919 at the bottom). Looks a bit different now but that's fine.