You can check for issues with location storage (indexedDB).

• https://firefox-storage-test.glitch.me/

Does it work in a New Private Window ?

For some unknown reason between this morning and this evening, while I was away from my computer, it apparently healed itself. It did not work this morning and this evening I tried the private window and it worked there and then I tried a normal Firefox window and it worked there also.

I have no idea what happened but thanks for the input. Perhaps opening in a private window repaired it.