Or you can just use FF containers - which is 99% less work.

Yea, but those came about after I'd built the wrapper for quickly launching different profiles of either Chrome or FF.

FF containers are more work than the 2 clicks I do now, powered by some Python I wrote like 15 years ago (with minor maintenance).

you still have to switch through browser windows right? with containers it is just a tab click and you can put related tabs for a particular topic in a single window