# How to use multiple compartmentalized Firefox instances simultaneously using profiles [](https://www.youtube.com/watch?v=Upib_vq_EB8 "How to use multiple compartmentalized Firefox instances using profiles - YouTube") ## Guide ### Step 1: create Firefox profile ```shell /Applications/Firefox.app/Contents/MacOS/firefox-bin -p ``` ### Step 2: open “Script Editor” and paste following snippet > Heads-up: replace `work` with profile name from [step 1](#step-1-create-firefox-profile). ``` do shell script "nohup /Applications/Firefox.app/Contents/MacOS/firefox-bin -p \"work\" --no-remote > /dev/null 2>&1 &" ```  ### Step 3: export script as application Click “File”, then “Export…”, set “Export As” filename to “Firefox work” (or any other filename), select “Applications” folder (in “Favorites”), select “Application” file format and click “Save”.  ### Step 4: configure app as agent app > Heads-up: replace `Firefox work` with filename from [step 3](#step-3-export-script-as-application). ```shell defaults write "/Applications/Firefox work.app/Contents/Info.plist" LSUIElement -bool yes ``` ### Step 5 (optional): replace default icon with Firefox icon > Heads-up: replace `Firefox work` with filename from [step 3](#step-3-export-script-as-application). ```shell cp "/Applications/Firefox.app/Contents/Resources/firefox.icns" "/Applications/Firefox work.app/Contents/Resources/applet.icns" ``` 👍