I've wanted to install an extension from outside addons.mozilla.org, but Firefox didn't let me do it
So I've did a small research and looks like there are 3 ways to sideload extensions, but all of them suck
Using FF Developer Edition
In the Dev Edition you can set xpinstall.signatures.required to false in about:config, but the problem is that the Dev Edition isn't as stable as standard FF
Temporarily load the extension
In about:debugging#/runtime/this-firefox you can temporarily sideload extensions, but they will be removed next time you open FF, which is annoying
Modify FF code
Lastly, I found this script which modifies the FF code, but this can break things so I don't want to use it
I'm really annoyed that Mozilla gets to decide which extensions I can install. So... what's the best way to sideload extensions?
Edit: thanks everyone, I'm now using a FF fork (Librewolf) which lets me sideload extensions after disabling xpinstall.signatures.required
I've been using option 3 for some time now without any problems. It's a very small modification and I don't see why it would break anything. Do you have any examples?
This script is not well tested, like at all. This script might break things, possibly important things. You should probably take a backup of your Firefox profile before using it. You have been warned.
So it's understandable that you might think it could break things.