Firefox for Android’s Play Integrity check hits custom ROMs

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Firefox for Android's Play Integrity check hits custom ROMs

Mozilla has added support for Google's Play Integrity API, known for blocking users of custom ROMs from accessing banking apps, to Firefox for Android. Per a resolved issue in Mozilla's public tracker, a new lib-integrity-googleplay library was added to Firefox's Android codebase. It requests a Play Integrity token which is then passed to Mozilla's MLPA (Machine Learning Proxy) server. The token is used to access Firefox's server-side AI tools, like Smart Window, for rate-limiting purposes, ensuring only unmodified, Play-installed copies of Firefox on Google-certified devices use Mozilla's compute infra. Per documentation for the API, developers can: "...call the Integrity API [...] to [...]

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Categories: News, Android, Mozilla
Source: https://www.omgubuntu.co.uk/2026/06/mozilla-firefox-android-google-play-integrity Jun 09, 2026, 11:55 PM