alt Hacker NewsMany replies about Firefox having no problems on Youtube but I will confirm your complaint that it's an ongoing issue for some of us.
I keep retrying Firefox over multiple years and it's still not quite equal to Chrome for Youtube 4k playback ...
2021: https://news.ycombinator.com/item?id=28783904
2024: https://news.ycombinator.com/item?id=42176450
2026 still talks about the problem: https://go.tabbit.ai/blog/firefox-youtube-4k-stuttering
And a recent Youtube comment (2026-September) notices that Firefox doesn't run as well as Chrome on his modern high-end laptop with 64GB RAM: https://www.youtube.com/watch?v=vIE_PkuFeng&lc=UgxfGeBL6sopr...
Replies
yipinwong • yesterday at 9:04 PM
"Works on My Machine" reply.
4k? That might have something to do with it. Though given a big enough box that too shouldn't be an issue. But I'm using a decade+ old thinkpad driving a fairly high res dell and it works well enough.