UI Bug: "Back to tab" in Picture-in-Picture (PiP) goes to a random tab in the wrong Firefox profile
When watching a video in Picture-in-Picture (PiP) fullscreen mode while two different Firefox profiles are running simultaneously, clicking the "Back to tab" button inside the PiP window behaves incorrectly. instead of returning to the specific profile and tab where the video is actually playing, Firefox switches focus to an unrelated profile and a completely random tab.
I didn't file this issue in official channels.