Probably just resources. Mozilla has to vet each update to give them the "recommended" badge and so they probably focus on the most popular extensions

> Tampermonkey - Rating 4.7 (5,306 reviews) - 760,294 Users

> Violentmonkey - Rating 4.7 (793 reviews) - 164,622 Users

On Google Web Store, it's 11,000,000 users VS 900,000 users.

Their popularity seems different by a magnitude, hardly surprising Firefox/Mozilla would chose to focus on one above the other.

I see GP's point tho. The original Greacemonkey was open-sourced. Tampermonkey was the successor and is proprietary. Violentmonkey came to fix that. I wouldn't be surprised if Mozilla rejected TM because of not being OS and rejected VM because of lack of popularity

I get what you mean, and it'd be cool if "Recommended" was only for FOSS, but I don't think that ever been the case? Probably lots of the "Recommended" extensions are proprietary, from https://addons.mozilla.org/en-US/firefox/search/?promoted=re... you don't get far before hitting one, the 3rd extension already is proprietary out of those, surely more.

I still just use Greasemonkey. What is even the point of both successors on Firefox?

I suspect they no longer recommend either because either can download/execute scripts that Mozilla can't review, and the recommended extensions are reviewed, so they don't want to give users the wrong impression.

I could be wrong, however.

I suspect it’s because it’s a pain to review that type of codebase, and they update it decently often.

FireMonkey is the one to use. Not verified, but that doesn't matter.