Please leave the tag set. Me setting the tag was not for you but for mozilla-bugs team. As i recall this bug was never fixed and its not so much a bug as it is a feature people want added. since using 2 screens is just the same as using one still only one instance of firefox can be open at a time, please report this upstream and give us the upstream bug URL on this bug.
** Tags added: likely-dup -- After start firefox in the Second Screen, firefox refuse to start in the main screen if it is still opened in the second screen https://bugs.launchpad.net/bugs/120181 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs