Browsers should have a setting to allow multiple profiles.
I have a Google profile for personal (bookmarks, gmail, calendar, reader, etc) .
But I also have a Google profile for work (adwords, analytics, etc) .
Since I use both throughout the day, I have to use Chrome for personal and general browsing and Firefox or IE for work. Otherwise I’d have to log in and out all day depending on what service I need (work or personal).
I wish Chrome (or the other browsers) would offer a way to maintain different profiles (e.g. work / personal / testing ,etc) where cookie settings and storage, bookmarks, etc. would be unique for each.
So you can use one browser without having to log in and out all day.