I'll wait for my extensions to come available before downloading. Those are the sole reason for me using firefox on a regular basis. The browser itself doesn't impress me.
You can set it a couple of ways. Open up each page you want set in a separate tab. Go to tools->preferences and main tab were you usually set your home page. You can click the option to set all pages which will just separate all the url's with a |. Or you can set a bookmark folder and it will use the bookmarks you have in that folder