# How to use multiple compartmentalized Firefox instances simultaneously using profiles [![How to use multiple compartmentalized Firefox instances simultaneously using profiles - YouTube](how-to-use-multiple-compartmentalized-firefox-instances-simultaneously-using-profiles.png)](https://www.youtube.com/watch?v=Upib_vq_EB8 "How to use multiple compartmentalized Firefox instances simultaneously using profiles - YouTube") **Step 1: create Firefox profile** ```shell /Applications/Firefox.app/Contents/MacOS/firefox-bin -p ``` **Step 2: open Firefox profile** **Heads-up:** in the following command, make sure you replace `work` by the name of your profile. If the name includes spaces, please use quotes (example: `-p "Work Profile"`). ```shell nohup /Applications/Firefox.app/Contents/MacOS/firefox-bin -p work --no-remote > /dev/null 2>&1 & ```