[prettymuchnoone]

by "Mozilla approved" do you mean that it has to come from the official add-on store?

because in my experience, it doesn't--I've installed a couple of extensions manually by just dragging the .xpi into the window.

[uyzstvqs]

Extensions in Firefox are required to be signed by Mozilla. If you make your own build of an open-source extension, it will not load. The setting to disable this check only works in Developer Edition, ESR and Nightly builds.

https://support.mozilla.org/en-US/kb/add-on-signing-in-firef...

[layer8]

What‘s wrong with ESR? I would recommend using ESR anyway.

[rpdillon]

Installing the developer edition seems like the move.

[efreak]

Firefox nightly is pretty darn stable, though I'm not sure if there's any security issues with it. I use it for both mobile and desktop, and have for the past 5~10 years and haven't had any issues that weren't fixed by immediately downloading a fresh build (this happened twice) or were caused by me performing unsupported/insane actions (transferring browser profiles (indexeddb) on mobile via CLI commands using remote devtools).

I've got one buggy device, but I suspect corruption due to the error message and I'm more interested in saving the unsyncable data I've got on that profile than I am in trying to fix it by clearing data.

[Dylan16807]

Installing one of those builds is a deal breaker?