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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[–] 1 point 1 year ago (6 children)

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.

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  • [–] 2 points 1 year ago (5 children)

    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.

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  • [–] 1 point 1 year ago (4 children)

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

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  • [–] 1 point 1 year ago (3 children)

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

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  • [–] 1 point 1 year ago (2 children)

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

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