If you want two instances of Firefox running, say one for your  normal browsing and the other to host “web applications” such as Hoot Suite, or your blog open all the time and pinned to a desktop/space, this will work.

First: commands for opening up another running instance of FireFox from the command line (The example here is given for Windows, but applies if adjusted accordingly for Mac OS X.) : http://kb.mozillazine.org/Opening_a_new_instance_of_your_Mozilla_application_with_another_profile
Another more complicated method here: http://mabouali.wordpress.com/2011/07/18/opening-multiple-instances-of-safari-or-firefox-on-mac-os-x/

Second, in Mac OS X, using the Automator: http://stackoverflow.com/questions/281372/executing-shell-scripts-from-the-os-x-dock 

Or Apple Script (actually uses FF as an example): http://superuser.com/questions/16750/how-can-i-run-an-application-with-command-line-arguments-in-mac-os
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Update:

Son of a gun… seems like the “assign to” feature would still apply to both instances/profiles.

Devil!

3 comments on “Firefox: Open multiple instances

  • OH WOW, TOTAL EMBARRASSMENT. I get now, after thinking about it for a couple more minutes, that "KD" stands for "Kirsten Dunst". Ahh, had me all excited for a moment, Leslie. LOL. Watta brain fart on my part. Hahahaa.

  • Update:Holy crap, was I oblivious when I wrote this — and the above comment. Given my recent discovery, I feel I need to say something here to clarify. I guess I didn’t really see myself as fitting into the autism spectrum at the time. Remember, “girls don’t develop autism spectrum dirdeorss”. I guess thought I was just a weirdo. And to think I brushed off my fiance a few years ago when he suggested that I was. Well, don’t I feel sheepish after reading this comment. Maybe I’ll print off my words and go eat them, with some mustard.Happy Trails,Nicole

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