in my experience, a ton of chrome extensions (at least MV2 ones) work in FF basically out of the box it's not necessarily true the other way around, though, be

in my experience, a ton of chrome extensions (at least MV2 ones) work in FF basically out of the box it's not necessarily true the other way around, though, because there are some weird things that google chooses not to support (e.g. promises, they require that you use callbacks instead)