The modern Firefox solution are the containers mentioned elsewhere in this thread. Basic UI for that feature is part of default install, and that basic UI cover

The modern Firefox solution are the containers mentioned elsewhere in this thread. Basic UI for that feature is part of default install, and that basic UI covers exactly the work/personal/banking/porn usecase. Also, Firefox still supports the original Mozilla concept of multiple profiles (which probably even comes from Netscape 4) which is more or less the same thing as Chromium profiles. IIRC the command line options involved in that are same, except last time I cared about that (~2017) Chromium did not have an GUI profile selection/management dialog