How do you develop extensions then? Surely it must be possible somehow.

NBPEL · on Dec 8, 2023

Not impossible, at all.

The answer is Firefox Nightly or Firefox Developer, you're freely to install unsigned addons in these editions.

fwn · on Dec 10, 2023

> Not impossible, at all. The answer is Firefox Nightly or Firefox Developer, you're freely to install unsigned addons in these editions.

I do use Firefox for Android Nightly. How would I install an unsigned addon there?

I don't think it's possible. ... but if it were, this would be very useful to get the Anti-Paywall addons back.

NBPEL · on Dec 11, 2023

It's called Sideload XPI, iirc Firefox Nightly allows you to sideload XPI if you enable Experimental by tapping Firefox logo in About 7 times.

But it's easier with Ice Raven or Smart Cookie Web Preview: