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I am trying to start the profile manager for Firefox running the following command in a terminal:

/Applications/Firefox.app/Contents/MacOS/firefox-bin --ProfileManager

But this opens just Firefox. Probably a new session, but I'm not sure. It surely does not start the Profile Manager. Is there anything else I can try to start the Profile Manager?

macOS Mojave, Firefox 72.0.2

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  • Do you already have Firefox running?
    – Allan
    Feb 7 '20 at 17:59
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To start the Profile Mnager, Firefox must not be running. Also, the command to start Profile Manager from the command line is:

/Applications/Firefox.app/Contents/MacOS/firefox -ProfileManager

Note, that it's only one dash preceding the option and you don't need to use firefox-bin. You can also use the short hand version, firefox -P as well.

Mozilla has excellent documentation on its Command Line Options.

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