@Curt - Extension List Dumper is incompatible with Quantum - boy, Mozilla sure knows how to create a mess!
Are they competing with Microsoft with their Hotmail, Live and Outlook?
At one point i was wondering why Firefox was over 1.5G is resource usage as opposed to Vivaldi or Edge which were hanging around .400-500
Turns out, after removing half a dozen extensions, one by one, it was Adguard the culprit.
So now, i've been using uBlock Origin on all browsers and it is doing fine.
Sure, don't want to point the finger at Adguard since it could be a compatibility issue with other extensions right?
Then again, thought Mozilla would have had all these issues resolved since the day they kicked out all the good old legacy extensions...