"Restore session" is not checked, but it tries to restore it anyway Within a second or two of startup, it greys out the checkmark on "always check whether ff is your default browser", preventing it from being cleared.
Recent version is 68.0.2.
Confirm it greys out the checkmark on "always check whether ff is your default browser". (on 68.0.2).
(In reply to fidhleir99 from comment #0) Is either issue reproducible with Firefox 95.0.2 in safe mode?