This is great. It makes https://printervention.app (https://news.ycombinator.com/item?id=47677885) and the soon-to-be-released https://yes-we-scan.app work on Firefox.

It would be even greater if it were possible to avoid the two-step installation. It certainly used to be possible to ship a binary inside a Firefox extension (I did that here: https://mackerron.com/zot2bib/), but I guess they may have shut that capability down for security reasons?