When you are the one who pulls your installation trough: choco install firefox & choco install firefox-esr Does it make sence the installer uses the same path/subfoler to be installed in, Just saying 😉 it will use 'C:\Program Files\Mozilla Firefox\' as common path: yes i know its posible too change it trough install prompt, but you know as well as i they can't co-exist in same places, and will conflict under installation as well getting the wrong installler overwriteting the other installation. Then lash out in firefox.exe to say profile does not work with the version and if user wants to create new profile, what a mess that's have been going one for many years. since the days. So why not split your installer in two-three or more places as it should have been under 'C:\Program Files\Mozilla\Firefox 1-2-3-4\' C:\Program Files\Mozilla\Nightly\ C:\Program Files\Mozilla\Esr\ C:\Program Files\Mozilla\Common\ C:\Program Files\Mozilla\Thunderbird \ Greating from long time user.