103
submitted 2 days ago by omgubuntu@floss.social to c/firefox@fedia.io

Firefox users report high CPU and memory usage in the latest release, caused by browser's on-device AI inferencing for its 'smart tab grouping' feature.

https://www.omgubuntu.co.uk/2025/08/firefox-high-cpu-usage-inference-disable

#mozilla #firefox #opensource

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[-] justin@toot.io 3 points 1 day ago

@omgubuntu@floss.social #SwitchToLibrewolf

[-] jjjalljs@ttrpg.network 48 points 2 days ago

I don't want AI in my browser. I've been a consistent Firefox user for years but this might make me switch to a fork.

[-] sprack@lemmy.world 23 points 2 days ago

Under about:config, browser.tabs.groups.smart you can disable it.

[-] jjjalljs@ttrpg.network 23 points 2 days ago

Thanks for reminding me to do this.

I don't really want to have to keep checking the release notes for new AI bullshit, though.

[-] Tanoh@lemmy.world 10 points 1 day ago

....for now.

That is the standard playbook:

  • Introduce unpopular feature
  • Defend it by saying there is an option in preferences to disable it
  • Later hide the option in some obscure config instead
  • Finally, remove the option to disable it
[-] lime@feddit.nu 2 points 8 hours ago* (last edited 8 hours ago)

what have they removed so far?

[-] mouse@midwest.social 12 points 2 days ago* (last edited 2 days ago)

There's an option labeled Use AI to suggest tabs and a name for tab groups.

On 141 it's listed in Settings under the General => Tabs section.

It changes browser.tabs.groups.smart.userEnabled.

Looking at it further, either option will disable it. Here's the code that checks both values, https://github.com/mozilla-firefox/firefox/blob/FIREFOX-ANDROID_141_0_3_RELEASE/browser/components/tabbrowser/content/tabgroup-menu.js#L481

[-] relativestranger@feddit.nl 10 points 2 days ago

there used to be a more accessible toggle in settings for that. why tf would they take that out?

[-] Oisteink@feddit.nl 10 points 2 days ago

To keep most users from disabling it. Just like why the don’t make it opt in.

[-] remon@ani.social 8 points 2 days ago

Also everything that starts with "browser.ml.chat".

[-] chesheer@mastodon.bsd.cafe 20 points 2 days ago

@omgubuntu@floss.social Who the hell needs AI to group tabs? It's so absurd!
This is why we can't have nice things.

[-] pertho@mastodon.bsd.cafe 16 points 2 days ago

@omgubuntu@floss.social Yay. More AI crap to turn off. Just what we needed. Thanks, Mozilla.

[-] mariu5@ruhr.social 10 points 2 days ago

@omgubuntu@floss.social what is mozilla supposed to do? Inferencing is resource intensive by nature. Doing this in the cloud and users would complain about privacy. Not doing it at all and users would complain about Firefox feeling old and complicated

[-] Kommentator@muenchen.social 1 points 1 day ago

@omgubuntu@floss.social
Time to switch to vivaldi

[-] Hansae@lemmy.dbzer0.com 2 points 7 hours ago

Vivaldi is barely any better, its based on chrome.

[-] weston@techhub.social 9 points 2 days ago

@omgubuntu@floss.social I can't wait for this bubble to pop. The suspense is killing me.

[-] f800gecko@mastodon.online 2 points 1 day ago

@omgubuntu@floss.social

'Running down battery life' over millions upon millions of devices is a massive energy suck.

It is not trivial.

[-] 1024Bytes@masto.ai 4 points 1 day ago

@omgubuntu@floss.social Thankls, not noticed AI sneaked in. because i have the sidebar removed. AI and other sidebar stuff disabled in settings. And.. remove doffcourse that useless annoying sidebar again.

[-] Vincent@feddit.nl 7 points 2 days ago

Here's the bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1982278#c4

It does not appear to be caused by smart tab grouping (which you also have to actively enable yourself).

[-] HubertManne@piefed.social 7 points 2 days ago

it was enabled for me and I just took it off. I ever enabled it so it must be default to have it on.

[-] Vincent@feddit.nl 1 points 1 day ago

If by "enabled" you mean you saw a button "Suggest more of my tabs", then I believe that is present by default, but I believe it only downloads the model when you actually press that button for the first time. At least it did for me.

It's possible that I'm misunderstanding what it does otherwise though. Still, does not appear to have been the cause of this particular issue.

[-] HubertManne@piefed.social 2 points 1 day ago

nope. literally says "Use AI to suggest tabs and a name for tab groups" and the slider was activated and I flipped it to off. Never saw a download but when it updates firefox either has to be closed or it restarts.

[-] Vincent@feddit.nl 1 points 8 hours ago

Weird, I don't even see a slider! Perhaps we're in different testing groups or something.

[-] HubertManne@piefed.social 1 points 1 hour ago

im on linux and using what I think is bog standard firefox with a few addons.

[-] Vincent@feddit.nl 1 points 1 hour ago

Same! But I think people are just randomly sorted in buckets to see how some experiments land.

[-] HubertManne@piefed.social 1 points 31 minutes ago

I am on an lts kernel (ubuntu) to. not sure if that would make a difference.

[-] scytale@piefed.zip 4 points 1 day ago

Yeah it's been incredibly slow in macOS and Linux. Bitwarden has also been slow but I'm not sure if it's FF that's causing it. It's slowly becoming a bloated mess.

[-] kroko@piefed.world 1 points 1 day ago* (last edited 1 day ago)

True, Bitwarden adon have been buggy in the last few days.

[-] apzpins@mstdn.games 3 points 1 day ago

@omgubuntu@floss.social Odd, this was disabled by default on mine. I had already started to wonder if they'd find a new way to cause grief.

[-] darcmage@lemmy.dbzer0.com 3 points 2 days ago

I didn't realize it was out. I'm guessing it's a phased rollout with windows users being first in the test group? None of my linux machines have it enabled by default.

[-] earwigplanet@mastodon.social 2 points 2 days ago

@omgubuntu@floss.social Since this upgrade, Firefox routinely crashes on startup and freezes once it does finally load. Takes about 5 minutes now just to open on my end.

[-] quincy@chaos.social 1 points 1 day ago

@omgubuntu@floss.social

🤦

[-] toddz@social.linux.pizza 2 points 2 days ago

@omgubuntu@floss.social THANK YOU! The last update made Firefox unusable even on my fairly capable desktop but I hadn’t figured out why.

[-] zeroase@fosstodon.org 1 points 1 day ago

@omgubuntu@floss.social I can only recommend switching to Firefox ESR. It's the same old Firefox, but without the monthly brain farts.

[-] aemstuz@pol.social 1 points 1 day ago

@omgubuntu@floss.social So good I've moved to Vivaldi recently 😌

#Vivaldi

[-] Miner34@mastodon.social 1 points 2 days ago

@omgubuntu@floss.social Well, better than running it on the cloud. Still, this is a great reason to switch to a firefox derivate like Librewolf or Floorp.

[-] vintprox@techhub.social 1 points 2 days ago

@omgubuntu@floss.social Fucking Mozilla, man!

[-] Sturmflut@mastodon.social 1 points 2 days ago

@omgubuntu@floss.social I'm so sick and tired of having to wade through about: config to disable poorly implemented stuff

this post was submitted on 11 Aug 2025
103 points (100.0% liked)

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