%APPDATA%\Mozilla\Firefox\Profiles\

1. If Firefox is open, close Firefox:Click the menu button and then click Exit .
2. Click the Windows Start button and select Run....
3. In the Run dialog box, type in:
   firefox.exe -P
   Note: You can use -P, -p or -ProfileManager (any of them should work).
4. Click OK. The Firefox Profile Manager (Choose User Profile) window should open.

Firefox (32-bit) on 64-bit Windows

• "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -P

Firefox (32-bit) on 32-bit Windows (or 64-bit Firefox on 64-bit Windows)

• "C:\Program Files\Mozilla Firefox\firefox.exe" -P