I have two monitors hooked up to my nvidia card. I'm running the proprietary nvidia driver, set up so that I have one X display for each monitor.
The problem is, I can only use Firefox in one display/monitor at once. If I try to open it in both displays, I get that familiar message:
Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.
I can, however, use the DISPLAY specifier to open a firefox window in the display that already has firefox in it:
But this is not what I want. It seems like firefox gets locked into one display. How can I fix this? I don't want to run another instance of firefox as another user. I also can't run TwinView with the combination of monitors that I have.