When using Picture-in-Picture (PiP), don't scroll to the top of the page when clicking on a timestamp that displays the time of the video.
< Feedback op Youtube scroll lock timestamp in picture-in-picture
Firefox does not seem to support the Picture-in-Picture API.
https://bugzilla.mozilla.org/show_bug.cgi?id=1463402
Since it cannot determine if Picture-in-Picture is enabled, the script always acts as if it is disabled.
I found another script that always disables the scrolling of timestamps.
Please try using that one.
https://greasyfork.org/en/scripts/438943-youtube-no-scroll-to-top-on-timestamps
not working firefox