Missing Extensions & Theme
I am running the latest version [89.0 (64-bit)] and I have 7 extensions enabled and I "had" a custom theme. Now I have nothing and do not know when they all disappeared but believe it was in the past 10 days. I verified that all the extensions are activated.
I reviewed the customizer but none of my extensions were ever listed there. How do I find and restore them?
try a little test:
log out of your firefox account.
create a new blank profile by entering into address bar about:profiles then clicking on create new profile button.
then launch that profile
then log into fire fox account and invoke a sync
the new profile will take a little time to be populated with the sync data. but hopefully, everything will show up in it. if so, then you can delete the other profile.