text: As long as you have enough RAM and processing power, you can have as many browser as you want running all at the same time.\n\nI normally use Mozilla (full version of Foxfire and other Mozilla browser).  I will also have IE or Netscape (built by Mozilla, but owned by AOL) up and running at the same time.  Sometimes all three.\n\nThis also allows you to have more than one Yahoo Mail accounts open at the same time.  One in each browser.