That might be a known issue with macOS users running non-admin accounts. Updating to Firefox 125, that would have been released today, has been postponed because of this. *[https://bugzilla.mozilla.org/show_bug.cgi?id=1890764 1890764] - [macOS] Firefox 125 fails to update when running on non-admin accounts (<i>please do not comment in bug reports<br>https://bugzilla.mozilla.org/page.cgi?id=etiquette.html</i>)