Log Message:
firefox: Update to 121.0.1

Changelog:
121.0.1:
Fixed

  * Fixed unexpected line wrapping in some CJK contexts caused by changes in
    ideographic space handling. (Bug 1870973)

  * Fixed a hang when loading sites containing column-based layouts under some
    circumstances. (Bug 1867784)

  * Fixed missing rounded corners for videos playing over another video. (Bug
    1869994)

  * Fixed Firefox not closing properly and other applications being unable to
    use a USB security key after being previously used during a Firefox
    session. (Bug 1863135)