In Chrome it is possible to clear the Service Worker cache from the Dev Tools.
How can we achieve that in Firefox?
I've tried so far:
about:serviceworkers
about:preferences#privacy
Ctrl + F5
but it's still there...
Type this in the address bar of Firefox and deregister the service workers you want.
about:debugging#workers
EDIT: In newer versions #worker
anchor does not works. You will have to scroll down to Service Workers
section.