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Comment by Zealotux | Hacker News Reader

Is anyone else experiencing huge issues with Youtube on Firefox (MacOS) lately? The UI completely hangs for a few seconds, a restart of the browser helps, but I've disabled all extensions and it still hangs. Using the devtools it seems there's a huge GC happening periodically blocking the JS thread, no idea why.

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Was reading the comments to see if anyone experienced just that. Youtube sometimes becomes absolutely unusable with Firefox. Google Flights too. Would hate to switch back to Chrome but I keep having to switch back and forth.

https://addons.mozilla.org/en-US/firefox/addon/h264ify/

I recently experienced an issue with YouTube + Firefox + macOS where not only did parts of the UI lag bug the queue wouldn't advance at the end of a video unless I refreshed the page. It resolved when I allowed google.com and a few others in NoScript. I wonder why your disabling of extensions didn't resolve your issue. I haven't had any more problems in the last few weeks. Also, I'm on an M3 CPU.

That sounds similar to issues I've been having recently with my Firefox uMatrix setup, which only seems to resolve when I blanket-allow everything (which kinda defeats the whole point of having it)

Just today a video became extremely choppy and then stopped. A refresh fixed it. Same setup as yours.

I'm seeing this suddenly with Firefox on Windows. Persists even after reboots.

Same with Firefox on Windows

Linux too.

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