You want Profiles then. Run `firefox -P` to get a functional GUI. Create some profiles and named them. Create links that run `firefox -P Work`, `firefox -P Per

You want Profiles then. Run `firefox -P` to get a functional GUI. Create some profiles and named them. Create links that run `firefox -P Work`, `firefox -P Personal`, `firefox -P Furries`, whatever. If you have other firefox instances opened, add `--no-remote` to the command line. They are completely separate instances of Firefox, they share only the executable.