Comment by geza

I tried porting the extension over to Firefox when Firefox switched to WebExtensions, and at the time there were tons of incompatibilities, mostly with Firefox's Shadow DOM implementation (HabitLab is a huge and complicated codebase, porting it is non-trivial - I had an issue tracking it at https://github.com/habitlab/habitlab/issues/137 ). I'm sure it's a valid option for smaller extensions however. At the moment I'm trying to get it accepted on the Edge store, as Edge is much more compatible with Chrome extensions than Firefox.