It’s not broken - It’s an add-on that has to be updated every time that Firefox updates. The devs seem to not like it much since it is basically a workaround, but I’ve been using it for a couple years now with no issues. It can be tedious to update/reinstall every time FF updates, but It’s not so bad.
Firefox is currently in the process of rebuilding the official support. I don’t have particularly high hopes that they will get it right, but I’m reserving judgement until I see it.