Revision 2:
Is it really necessary to require the history setting to be "Firefox will remember history"? Why not drop that requirement and use the container idea as part of individual tabs in Firefox? Allow a setting that will "containerize" each individual tab.

Revision 1:
Containers now work after turning setting options/privacy & security/ history to "Firefox will remember history." Review will remain at 1 star - now I have to manually handle history and cookies. I'm not sure containers are worth this inconvenience.

Original Review:
Completely non-functional, counter intuitive, worthless and useless. Total gibberrish for user instructions. NUTS!!!!!!! really wish I could use this - but ........ I'll just have to rely on closing and restarting Firefox after using some google product or facebook.