Open multiple firefox instances with different profiles on Mac OS X

Question

What is the best way to open different firefox instances (firefox 3 to 10) with different profiles (on 10.5, 10.6 and 10.7)?

With versions prior to Firefox-7, modifying the content of the firefox package and adding -no-remote -P {PROFILE} worked.

However, with the latest versions of firefox it's not working.

I've also tried with Automator without success.

Has anyone faced a similar problem and fixed it?

Thanks

Answer 1

For new versions of Firefox use the following command:

/Applications/Firefox.app/Contents/MacOS/firefox-bin -P -no-remote &> /dev/null &

source: http://sonnygill.net/mac/mac-multiple-firefox-profiles/

On page explains how to use Automator to create a shortcut.

Answer 2

@dalvan answer does not work any more (10.15)

Workaround I've found is:

• run first firefox instance as normal (profile chooser window opens, select primary profile)
• use an Automator.app or run from shell /Applications/Firefox.app/Contents/MacOS/firefox-bin -P & and choose secondary profile

All links transfered from other applications will be opened in primary profile

Ref. https://bugzilla.mozilla.org/show_bug.cgi?id=1653218