[Firefox] Cannot manually install/update (add-on not signed)

[BillyJoeJimBob]

Previous version 2.54 installed from AMO still works but I am not able to manually install v2.5.5 in Firefox 113.0.2 because it is not verified, even with xpinstall.signatures.required set to "false", I get the following popup:

We are aware of this.

You can for now install the unsigned extension by going to about:addons choosing Install Add-on from file.

Originally posted by @drunkwinter in https://github.com/zerodytrash/Simple-YouTube-Age-Restriction-Bypass/issues/182#issuecomment-1464077159

[drunkwinter]

Previous information I gave was inaccurate, because I was used to testing the development builds through about:addons > Manage Your Extensions > Debug Add-ons.

Unfortunately, you will need to use an unbranded build, development build or another browser based on Firefox (Pale Moon, Waterfox, etc.) to install unsigned extensions.

We can not do anything about this issue, since our add-on got removed from addons.mozilla.org and therefore we are also unable to sign the add-on for self distribution.

I will make sure to update the README soon to reflect that we don't support Firefox Stable anymore.

[drunkwinter]

@BillyJoeJimBob

Thank you for you assistance on this! The old AMO v2.54 and current v2.55 userscript both function as expected. In a probably apples to oranges comparison, I was somehow able to install another extension Bypass Paywalls Clean that was removed from addons.mozilla.org earlier this year using about:addons > Install Add-on from file to install an .xpi file. see: https://gitlab.com/magnolia1234/bypass-paywalls-firefox-clean/-/releases. I've been using that unsigned extension in Firefox stable for a few months and It even self updates but I assume there is some security risk there.

Yes, I have seen some extensions do this. But those extensions submitted for signing are still being reviewed by the AMO team and are still subject to the same policies. I don't know if doing this is a smart move, but we will look into it.

[krystian3w]

Possible modify Firefox Stable to run that script:

https://stackoverflow.com/a/42403531 (Or something similar with an update for Firefox 115+ and 123+ - Somewhere on stackoverflow I mentioned updating for Firefox 78, probably in another question)

Legacy mod: https://github.com/xiaoxiaoflood/firefox-scripts

Aris mod: https://github.com/Aris-t2/CustomJSforFx

MrOtherGuy mod: https://github.com/MrOtherGuy/fx-autoconfig