I would like to suggest that you come up with a way to be able to save a window and its tabs into something like history that's more accessible. The point to this is to save system resources while doing other work.
An example of this would be this: A Firefox window is opened to shop for PC components. Multiple tabs are opened to various websites comparing prices. I would like a way to save that window and it's tabs and come back to it later. Minimizing that window would leave all those processes AND THEIR ADS running, downloading, playing, etc. in the background and I don't want that. Going back to it in History only saves the latest window. I would like to be able to save several of these windows with their tabs on different "topics" to go back to after work or on the weekend.
If there's an add-in that will do this, that would work too.