Yes, I know I could ask in FF land, however let's try here first. A bit more out-of-the-box.
I open a new window in Google (usually I have the setting as a background opening) and 30 minute later I go to the window to search for ... what was in the google search. However I forgot which search it was ! hmmm . Any extensions or tricks to overcome this ? Keep that search somewhere .. e.g. in the Find: bar when the window returns or a special little view area.
Another big FF need, the wonderful little "Find" box on the bottom bar. I want two or three of them, so I can toggle searches without retyping and remembering as I go over pages. Once I asked in FF land and got mostly blank stares, yet I think this would be 10x more effective that the fancy stuff they do in search land.