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- Mac: Open a Terminal window — press Command+Space, type Terminal, and press Enter to do it from Spotlight. Type `/Applications/Firefox.app/Contents/MacOS/firefox-bin -profilemanager` into the Terminal and press Enter.
- Linux: Open a terminal and run the `firefox -profilemanager` command.
This will bring up the profile manager, where you can create, rename, delete and launch profiles.
In this example, the profile `test` was created in the default `\AppData\Roaming\Mozilla\Firefox\Profiles` directory. WARNING: If you choose your own folder location for the profile, select a new or empty folder. If you choose a folder that isn't empty and you later remove the profile and choose the "Delete Files" option, everything inside that folder will be deleted.
Here is a [Mozilla Support](https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles) page, and here is a [How To Geek](https://www.howtogeek.com/209320/how-to-set-up-and-use-multiple-profiles-user-accounts-in-firefox/) article with much of the same, but with lots of pictures.
In Windows, in your `<username>\AppData\Roaming\Mozilla\Firefox` directory you will find a `profiles.ini`. With Firefox closed, copy a new default profile, or clone your existing one, and put them anywhere you like (e.g: on a secondary drive). Create as many as you like. Then edit the `profiles.ini`.
Here is an example
```ini
[General]
StartWithLastProfile=1
[Profile0]
Name=Default
IsRelative=1
Path=Profiles/hcac5r43.default
[Profile1]
Name=test
IsRelative=1
Path=Profiles/e6xjz6ty.test
Default=1
[Profile2]
Name=Hardened
IsRelative=0
Path=D:\UserData\Firefox Profiles\hardened
[Profile3]
Name=Relaxed
IsRelative=0
Path=D:\UserData\Firefox Profiles\relaxed
```
### :small_orange_diamond: Loading Profiles
Firefox only wants you to use a single profile at once. However, you can use concurrent profiles if you like.
To do this, you’ll just need to launch Firefox with the `-no-remote` switch. You could do this from the Run dialog or terminal, or just modify an existing Firefox shortcut.
-`TIP`:
*`-p -no-remote` will bring up the profile manager
*`-no-remote -p "profile-name"` will load a profile directly
You can read more about [Concurrent Profiles](https://github.com/arkenfox/user.js/wiki/2.3-Concurrent-Profiles) in the next section.