Does anyone know if it is possible (or if I need a particular add on) so that I can maintain multiple log in/password details for the same website? I use yahoo mail for my personal email and I also have a yahoo account for a voluntary service I am part of and it would be very handy if I can open up two tabs, one with a different yahoo account logged in so that I can check my messages etc. I'm aware that this may be not be possible because of the way cookies work, but thought that firefox may have some functionality that may allow this.