Does it change anything to do with firefox?

[mTvare6]

I finally disabled SIP and injected yabai to dock, And after this I noticed lot of thing changed in firefox, the bars around tabs because of yabai, or something else happened in between?

[koekeishiya]

This could be an issue where tabs report an incorrect accessibility role. Firstly, do you have any rules in your yabairc file?

Otherwise, try to disable window borders: yabai -m config window_border off to disable globally, or simply disable just for firefox yabai -m rule --add app="^Firefox$" border=off