I need fine grained, automated cookie controls I have tried these addons
Cookie Manager Cookie Quick Manager Cookie AutoDelete
And the problem is always the same.
It is TOO DIFFICULT to only have one exception for one cookie in one account container
Creating containers for every single website is also extremely tedious and buggy.
And deleting all cookies all the time, means I am re-logging in into everything all the time, often a 5 to 10 step process not counting 2 factor and it is VERY annoying
Yes, I am considering using multiple portable instances of waterfox for this exact purpose. I think my final solution will be a mix of many different methods of containment and parrallel instances.