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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[–] 48 points 1 year ago (8 children)

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.

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  • [–] 23 points 1 year ago (7 children)

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

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  • [–] 11 points 1 year 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

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