[Santosh83]

This about:config toggle seems to be a "nuclear option" that disables the entire "quarantined domains" functionality. It would be better if Mozilla offered users a choice to toggle only certain blocked addons on certain domains, though the normal UI.

[Xylakant]

I agree, that would be better. But the current situation is strictly better than before, even if it’s not perfect - it protects you until you flip that switch and when you do, you’re exactly where you were before they added the feature. So nobody is worse off and many are better off.