you can sync with a firefox account with firefox sync. im sure you could make a personal firefox account and work account to switch between

In the US you can typically drink from the tap but I would advise not, some areas are really bad to drink from the tap, but you should always have a filter at the very least. boiling isn’t so necessary.

I once visted Austria (Innsbruck to be precise) and the water there was so incredible straight from the tap. It would be ice cold, so fresh and clean. I think they have the best water in the world there.