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

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: - https://old.reddit.com/r/browsers/comments/18ezd3g/iceraven_now_allows_extensions_to_be_installed/ https://old.reddit.com/r/browsers/comments/18ezd3g/iceraven_... - https://github.com/CookieJarApps/SmartCookieWeb-Preview/releases/ https://github.com/CookieJarApps/SmartCookieWeb-Preview/rele...