Could you check whether updates are blocked by a policy? To view that, type or paste about:policies in the address bar and press Return to load it. Normally, the "Active" list says "The Enterprise Policies service is inactive." Does yours list anything else?

I run Windows, so I can't share any personal experience with re-installing on Mac. My understanding is that you trash Firefox, telling it NOT to remove your data if it asks, then install the latest version. But I suggest waiting for advice from someone with hands-on Mac experience.

For possible reference:

• Update Firefox to the latest release
• How to download and install Firefox on Mac

Firefox support has ended for Mac OS X 10.6, 10.7 and 10.8 https://support.mozilla.org/en-US/kb/firefox-osx

Firefox support has ended for Mac OS X 10.6, 10.7 and 10.8 https://support.mozilla.org/en-US/kb/firefox-osx

Rather old article and the more current was https://support.mozilla.org/en-US/kb/firefox-mac-osx-users-esr

Besides the OP is using Mac OS X 10.15 which is above the minimum requirement of 10.12 to use Fx 79.0 and later.

Opps. :-/

Thanks everyone for your assistance.

@jscher2000 I checked as suggested and mine also only shows The Enterprise Policies service is inactive.

Weird thing though, I just checked the About Firefox menu item and now it says Update to 95.0.2 I haven't tried to update yet but it should be OK. I currently have a lot of windows/tabs open (and some have been open for a long time), so it is possible that Firefox got 'confused' about what version it was trying to update to, since multiple updates have been released during the time these windows/tabs have been open. I have no factual information to base this on, but I thought I'd mention it in case someone else runs into the same issue.