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I can pass a -url="..." parameter to launch FF for a URL, but I want to launch it with just that URL open, nothing else... I'm testing a browser plugin so if other pages are automatically opened from a previous session, this is pretty annoying!

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up vote 2 down vote accepted

Create a second firefox profile (start using -profilemanager) and select that profile (-P profilename) for your browser plugin testing (disable session restore for that profile).

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