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WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been uninstalled with the extension. This vulnerability affects Firefox < 95.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade librewolfUpgrade firefox | Aug 22, 2024 | Dec 8, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Dec 8, 2021 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade www-client/firefox-bin. | Feb 22, 2022 | Dec 8, 2021 |
| Mfsa2021 52 | — | Upgrade to Mozilla Firefox version 95.0Upgrade to the latest version of Mozilla Firefox | Dec 8, 2021 | Dec 7, 2021 |
| Ubuntu | — | Upgrade firefox | Dec 10, 2021 | Dec 8, 2021 |
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