Hi Mel,
well the easiest way to tell you is to go to the page you want.
like type in www.MSN.com
you're using Firefox right?
If so-
go to Tools ,Options & the Main tab

One box should say Show my home page
and below that
-the next box you will need to click use current
then it should change and you can close out and then test it by clicking the home button.

IE is quite similar you would go to Msn.com - then go to the General tab and click the use current button.