Rated 5 out of 5 stars

> Note: When swapping profiles with CookieSwap, the cookies in all tabs and all browser windows are changed at the same time.

You can look at CookiePie extension that create separate cookies for each tab:
http://www.nektra.com/oss/firefox/extensions/cookiepie/

This review is for a previous version of the add-on (0.5.248Beta).