I get this on Linux (Ubuntu 8.04) when adding an extra monitor using xrandr.
As to bug 62395, in this case window.screen still shows the resolution of the original screen, not the combined resolution.
Changing OS to All as a result.
There's an upstream Ubuntu bug at https://bugs.launchpad.net/ubuntu/+source/firefox-3.0/+bug/229298
See also bug 239043 which had some comments relating to this.
I get this on Linux (Ubuntu 8.04) when adding an extra monitor using xrandr. /bugs.launchpad .net/ubuntu/ +source/ firefox- 3.0/+bug/ 229298
As to bug 62395, in this case window.screen still shows the resolution of the original screen, not the combined resolution.
Changing OS to All as a result.
There's an upstream Ubuntu bug at https:/
See also bug 239043 which had some comments relating to this.