Add a setting to hide the size of the maximized browser window
Tor Browser warn with this popup message when you maximize the window:
Maximizing Tor Browser can allow websites to determine your monitor size, which can be used to track you. We recommend that you leave Tor Browser windows in their original default size.
I think you should add a setting to detect the real screen resolution of maximized browser and mask the values.
Trac:
Username: David_Hedlund