A maintenance release of Firefox 121.0.1 is available, which includes the following fixes:
- Fixed a hang that occurred when loading some sites with multi-column content, such as doordash.com.
- Fixed an issue where corner rounding specified via the CSS border-radius property would disappear for a video played on top of another video.
- Fixed an issue with Firefox not closing correctly, resulting in applications being unable to use FIDO2 USB keys after using them in Firefox.
Source: opennet.ru