v.16.7.0 worked fine for me on FF52 ESR. However, v.16.8.0 completely broke, with no icons in either “available services” or “my services”. So I thought I’d re-install 16.7.0 - except ALL previous, older, versions have been deleted from the Version History page!!! Other add-ons still maintain a history of downloadable previous add-ons, so why has Google Shortcuts deleted theirs?

I managed to get back to v.16.7.0 by restoring my FF profile from a Time Machine backup on my Mac. But I shouldn’t have had to, had previous versions still been there on AMO.

I can’t give more than 1 star for something that doesn’t work at all...