Hello everyone! Firstly, greetings to the community, I hope you people are staying safe. Please refer to my previous questions [https://support.mozilla.org/en-US/questions/1268819 number one] and [https://support.mozilla.org/en-US/questions/1273792 number two]. Do note that my second question has NOT received A SINGLE REPLY from anybody. I have now updated to version 72 and then subsequently to version 76.0.1 (which the latest one at the time of writing this question. I am still suffering from the same problem of stuttering 1080p 60fps YouTube videos due to frame drops, '''especially using the VP9 codec''', although other codecs also drop a few frames. Do note that the audio works just fine in real-time without any lag, and this problem exists ONLY for 1080p @ 60 fps, not for any other resolution or frame rate. I have referred to the following links to try and solve my problem:- # https://www.reddit.com/r/firefox/comments/8qhbhg/h264_1080p_60fps_stutter_youtube_vimeo_etc/ # https://support.mozilla.org/en-US/questions/1277519 # https://www.mozilla.org/en-US/firefox/72.0.2/releasenotes/ # https://bugzilla.mozilla.org/show_bug.cgi?id=1608485 The Firefox version 72.0.2 release notes categorically state that the issue has been resolved and even points to the bugzilla page for the same. But it still exists even in version 76.0.1, which is surprising. I have tried every possible combination I can think of, from setting ''media.media-capabilities.enabled'' = '''false''' in '''about:config''' to disabling specific codecs and hardware acceleration, none of which solved the issue permanently to my satisfaction. A few settings, at times, improved the issue slightly but there was no permanent solution, even though this has been alluded to in a previous release note. Do note that my graphics drivers are updated and this issue is Firefox-specific, i.e other browsers work just fine. Even the older versions of Firefox work fine, as stated earlier. I would like to state that I prefer using the VP9 codec because other codecs take a toll on my relatively low-bandwidth network connection and this leads to longer buffering times (VP9 does not have this problem). I humbly request the community members and volunteers to help me in this regard, '''and if need be, point me to the proper channel for lodging a bug report directly to Mozilla'''. Thanks and regards,<br> Preetodeep Dev. ''P.S:-'' If this issue is not resolved, then I will have''' no choice but to go back to Firefox version 62.0.2''', which works just fine with all the default settings.