xpinstall.signatures.required no longer works

[KOLANICH]

`xpinstall.signatures.required` used to be working for allowing addons not signed by Mozilla to be installed into release builds of Firefox from Ubuntu packages (it doesn't work for release builds of Firefox for Windows because of Mozilla policy, but linux distros used to be applying patches and using the right defines at compile time to fix that), but it is no longer the case.

I'd also be fine to know what has caused that.

[Sebastien Bacher (seb128)]

Thank you for your bug report, which Ubuntu release and firefox version are you using? Could you exact steps to trigger the problem you describe, what did you try to install and what error did you get?

[KOLANICH (kolanich)]

>which Ubuntu release

Kubuntu `impish`

>and firefox version

93.0+build1-0ubuntu2 (the one latest in impish at the moment)

But the issue has appeared in `hirsute` somewhen this spring, it is I have just reported it.

>Could you exact steps to trigger the problem you describe, what did you try to install and what error did you get?

0. ensure that mandatory signing of addons is disabled by going to `about:config` and ensuring `xpinstall.signatures.required` is set to `false`
1. build a custom addon from source on GitHub
2. don't send it to Mozilla's service for signing
3. install it
4. The browser will force-disable the addon without a possibility to enable it. It will give you the following link https://support.mozilla.org/en-US/kb/add-on-signing-in-firefox