# 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") ## 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: set Firefox app environment variable > Heads-up: replace `Firefox work` with filename from [step 3](#step-3-export-script-as-application). ```shell FIREFOX_APP="Firefox work.app" ``` ### Step 5: configure app as agent and set icon ```shell defaults write "/Applications/$FIREFOX_APP/Contents/Info.plist" LSUIElement -bool yes cp "/Applications/Firefox.app/Contents/Resources/firefox.icns" "/Applications/$FIREFOX_APP/Contents/Resources/applet.icns" /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -f "/Applications/$FIREFOX_APP" ``` 👍