Mozilla released Firefox 100.0.2 on May 20, 2022. A small update that fixes two vulnerabilities, all of which are of critical difficulty. You can see the details of the vulnerabilities here. Thunderbird users can also search for an update right away because the vulnerabilities also affect the mail program.
You are on the safe side if you are using the update to version 91.9.1 of Thunderbird. In this sense: Just import the small update and be safer on the road.
AnnouncedMay 20, 2022ImpactcriticalProductsFirefox, Firefox ESR, Firefox for Android, ThunderbirdFixed in
- Firefox 100.0.2
- Firefox ESR 91.9.1
- Firefox for Android 100.3
- Thunderbird 91.9.1