I frequent a website where I have several windows open simultaneously and need to move windows from one monitor to another. When I do so, these windows Minimize and they do not display on the other monitor. The only way to display them once again is to Maximize them, but then they appear back on my first screen. I ran across the solution that has me rename two profile files (localstore.rfd and another which I forget at this time). I renamed both of these files in both firefox profiles, but the problem persists.