how to do that ? can i do it on chroome i planing to have 20 account want to be able to run them allYou don't need containers or any shit people said above for firefox.
You need to change the user agent for each one and run them on there own proxy each and just create different profiles for each and run them with
Code:firefox -P <profile-name> -no-remote
The no-remote switch allows you to run multiple instances without clashes and no other extension crap needed. Set the proxy in the preferences tab.