Comment 8 for bug 93546

This issue is especially bad for the common user on Linux/X, as programs like
KMail, etc., are used to ordering the platform browser to run with a given url,
in the expectation that either the running application will just open a new
window on the new url, or that the application won't mind multiple copies of
itself running.

It would be nice that if one ran 'mozilla', or 'mozilla-mail', that mozilla
would look to see if a browser instance was running in the same user account
with the same DISPLAY environment set, and if so, a signal would be sent to the
running instance so that it could open up the appopriate window.

I believe this is how it works on Windows now. It would make this issue much
less objectionable on X Windows if we could get the same kind of behavior.