I have been thinking of switching back from Chrome to Firefox. I haven't been able to find decent profile support though (so I can keep work and private data separate), and all profiles addons are broken at the moment.
Multiple profiles within a single window, visually distinguished by tab highlight color.
Create a new profile by going to about:profiles, and thereafter when you start Firefox it should present you with an option to pick which profile to use.
More options: https://developer.mozilla.org/en-US/docs/Mozilla/Command_Lin...
c:\apps\firefox\firefox.exe -no-remote -profile "C:\profiles\some-clean-profile"
was my was-to-go method for testing various configurations.Knowing about
%USERPROFILE%\AppData\Roaming\Mozilla\Firefox\profiles.ini
is also often helpful, eg. when you want to move certain profile folder.