This is what I mean
I found these answers, this is WAY too hard.
https://support.mozilla.org/en-US/questions/1341555
https://old.reddit.com/r/FirefoxCSS/comments/p485un/how_to_disable_the_audio_playing_icon/
Is there an easier solution ? To turn off these play/pause/mute button that I keep click on accidentally ? I already have good controls with "Find sound tab" audio addon and I don't need this