Thank you very much for this add-on.
I'm a low/intermediate Japanese student and have found the Furigana Inserter add-on an invaluable resource, a really incredible and special add-on that now I use every day. My kanji reading is yet not good enough (I'm improving slowly!) for complex tasks.
With the recent Firefox update (Quantum) a lot of add-on ceased to work. Please, would you consider to update Furigana Inserter?
Thank you very very much (really) for Furigana Inserter.