Okay, so it’s only two add-ons, but it’s a start. First, MR Tech’s Local Install from Mel Reyes was updated with support for Fennec. Then, URL Fixer from Chris Finke got support for Fennec.
A big thanks to Mel and Chris for taking the time to support Fennec, even in it’s alpha condition.
AutoAuth is Fennec-friendly now too, and YouTube Comment Snob has been updated as well, pending approval. (Of course, YTCS probably will not see any usage until Flash is available in Fennec, but it works nonetheless.)