I have been having this problem lately where Firefox won't remember the window position and size I assign it to, staying tucked away in the corner. It started when I started to use the [win key] + [arrow keys] to split my screen into 2. The thing is that it will remember the side it was last session, left or right; but it won't remember anything related to size. So every time I open Firefox I will have to manually maximize it which gets old pretty quickly. If I create a new profile it will magically work again but after logging in and importing my settings, bookmarks, etc, it will go back to the same problem. I have already tried reinstalling, disabling extensions and deleting xulstore.json (as well as getting the one from the new profile and replacing the old one). Help!