I have deleted my review from last week as the issue raised was clearly NOT due to the add on, and the failure of the zoom function to operate was down to Firefox/Nightly.

Version 105.0a1 (2022-07-26) (64-bit) was installed this morning, and ALL functions of the add on were restored - a number of lesser anomalies were fixed too. I changed nothing else.

I also updated from the roll back option, and have full functionality including all the new options added up to 5.3.9.