Ditto! I maintained Pentadactyl compatibility for a while when the dev team pushed breaks and the extension's metadata needed to be updated. You'll love my Hitler parody about my reaction to them breaking unsigned addons, which specifically references Pentadactyl.

"If every addon must be personally signed by Mozilla, why not just shrink-wrap the browser and make me get it from Microsoft at Best Buy?"

https://www.youtube.com/watch?v=taGARf8K5J8