Run multiple instances with separate profile

Commonly, only one Firefox instance can run at a time. Opening two or more instances, each instance featuring a different profile can be done using a trick.

macOS

1. Create a new file within /usr/local/bin:

   $ sudo touch /usr/local/bin/firefox
   

2. Open the file:

   $ sudo nano /usr/local/bin/firefox
   

3. Add the following content and save the file:

   #!/bin/zsh
   
   /Applications/Firefox.app/Contents/MacOS/firefox-bin -no-remote -P $1
   

4. To open Firefox using a specific profile, type:

   $ firefox <profile_name>
   

   Hint

   You can find out the profile name, open a Firefox window and enter about:profiles into the address bar. The profile names are listed there (Profile: <profile_name>).

   Please note, that profile names are case-sensitive. If the profile name is entered incorrectly, the profile selection screen appears and the profile must be selected manually. It’s still possible to open multiple instances with different profiles, though.

Linux

coming soon

Windows

coming soon