Please revert the hard extension signing requirement (but leave the about:config xpinstall.signatures.required option on by default).

It,
1. Makes it impossible to develop extensions on non-developer versions of Firefox (the developer version is not available in the repos).
2. Primarily exists to prevent Windows applications from disabling `xpinstall.signatures.required` and then side-loading a malicious extension.
3. Makes my blood boil. I use Arch because I don't like software telling me what I can and cannot do.

Arch users can already trivially break/compromise their systems if they do something stupid so this feature doesn't actually add any useful security.

I would normally just add Firefox to my list of applications to recompile myself. Unfortunately, it takes a very long time, a lot of scratch space, and a lot of memory to compile (I've never actually successfully compiled Firefox on my laptop due to these issues).