this post was submitted on 17 Sep 2025
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I know the Linux community has a hard time accepting this, but Firefox’s rendering engine is trash tier. Even in Windows.
I don’t know the inner workings or politics, I can only go by anecdotal evidence. Firefox runs like shit for me on everything.
🤷♂️
Going by my experience, the problem is something else at your end. Mind you, I don't load it down with loads of extensions.
Well anecdotally many of us have the opposite experience so I guess sucks to be you?
May I ask: when did you last try Firefox? There was a period during the 2010s when it has truly horrible performance, but they rolled out some major updates several years ago that greatly improved performance (though wouldn’t call some of the UI changes improvements).
Honestly, every major rendering engine is terrible in some way.
Ultimately, I choose Firefox because its issues are the least annoying to me. I do wish its structure was more community-based and less corporation-eating-its-own-hand, but whatever. So long as Debian sees it fit to keep in its repos, I’ll use it.
I'm a diehard Firefox user but i can instantly notice the preformance improvement when I'm using edge and chrome. I dont need my tech to be the best in class it just needs to work well which firefox does.
Moved off Firefox this month. I was die hard Firefox user for decades. All the way back to Netscape and the original Mozilla browser with the t-Rex logo.
I tried using zen and librewolf but they both suffered the same problem. Dogshit engine.
May I ask what your config was, such as distro, packaging format, and extensions were used? Also, what hardware?
Additionally, what issues specifically were you experiencing specifically? Were sites just loading slowly?
I ask because I’ve used recent versions Firefox on decently old hardware with 4 GB of RAM and 2 cores and had almost no problems. Everything rendered correctly and in a reasonable amount of time. I’d be curious to know why that isn’t happening for you.
It’s not that it renders incorrectly so much as abysmal performance. Choppy scrolling, page elements taking a long time to load, etc.
I did a bit of distro hopping lately so it was on a few distros mainly arch and Fedora base.
Also experienced this in windows 10 and 11.
the only sites ff is shit for is Google sites imo (e.g. earth and maps)
otherwise it's fine
Honestly, even those don’t run that horrid for me when I have to use them.
they're not unusable but you can definitely notice there's some Google fuckery going on
Also YouTube
https://lifehacker.com/tech/stop-google-slowing-down-youtube-firefox-edge
Changing the user agent seems to help in some cases
/thread
There’s like 3 rendering engines. Not everything can be described with a tier list.
Let's say it's just trash, then.