Settings/General/"Update Firefox" is missing, and FF doesn't update automatically

What OS? If windows, what security software besides MS Defender are you running? You don't see this sections? see screenshot Where did you get Firefox from?

Hello

According to your Windows and screenshot MSIX About Settings/General/"Update Firefox" is missing So, that's normal, an subject https://support.mozilla.org/en-US/questions/1403147 is it also your case?

OK the responses weren't very clear, but the link to the other article does potentially explain why the update FF section is missing - perhaps I did (unknowingly) get FF from MS. But the main question still holds: how do I update to the latest version. More importantly, can I just download and install the Mozilla version *on top* of the current version and keep the complete profile? Thank you, Nir

As far as i'm concerned, i don't know the answer

https://support.mozilla.org/en-US/kb/download-firefox-windows-microsoft-store Note: Some users have reported issues related to the about:support page when using the Microsoft Store version of Firefox. For example, Bug 1760396 and Bug 1788052 highlight problems with the about:support page not working correctly or displaying incorrect profile locations. If you encounter such issues, consider checking the bug reports for more information and potential solutions.

As a safety precaution https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data back up your profile

And take a look at https://connect.mozilla.org/t5/discussions/feedback-automatic-updates-and-forced-browser-restarts/m-p/74858/highlight/true#M28784 without detailed information on what has been done. And download https://www.mozilla.org/en-US/firefox/all/desktop-release/win64