From https://wiki.mozilla.org/Addons/Extension_Signing

"What are my options if I want to install unsigned extensions in Firefox?

The Developer Edition and Nightly versions of Firefox will have a setting to disable signature checks. There will also be special unbranded versions of Release and Beta that will have this setting, so that add-on developers can work on their add-ons without having to sign every build."

Ah, nice. Even so, I still have issues with this:

- Special version of the software

- Can't run my own version of AMO

> - Can't run my own version of AMO

You can, AMO is open source: https://github.com/mozilla/olympia

Run your own instance and make your own builds of Firefox that point to it and you're good.

>make your own builds of Firefox

Yeah, let me just get all of the potential users of my AMO alternative to compile a custom version of Firefox for it

If you want to run a custom AMO I'm assuming you're in a corporate environment or something like that where you can control what browser gets installed on people's machines.

https://addons.mozilla.org is an integral part of Firefox, if you set it up with an alternative you're effectively making your own fork.

It's not an integral part of Firefox, though. You can install add-ons without it by just clicking a link on any page that leads to an XPI, same as how AMO behaves.

And no, I'm not in a corporate environment. I'm talking about decentralization.

The cool thing about themes is that you can change them. Developer Edition just comes with a different default theme.

For some reason I thought you couldn't change it. That's fine, then.

Not only you can download a new theme but you can also develop a whole new one if you'd like.