I wish I had thought of using something like this years ago. Works great on the latest Beta of FF

Finally working session manager on FF57+, THANK YOU!

Works wonderfully in automatic mode with a configurable interval to suit your needs. Supports container state as of ver1.3.2.

Tiniest thing keeping me from 5-staring: Open and Remove are too close together & Remove has no confirmation.

Other than that little thing, I'm as happy as I can be.

Very good!

thank you so much