To setup multiple homepages in Firefox follow these easy steps:
- In the file menu (at the top of the screen), click tools then options
- Next, click on the main tab.
- In the home page text box, enter your homepage URLs separated by a pipe '|' for example: www.gmail.com | www.google.com | www.cnn.com | www.digg.com
Next time you boot up Firefox, or click the home button all of these web sites will open in separate tabs.