I liked the old version better and as soon as I downloaded the new version, I regretted it. On the old version I had the home key and the refresh key were on the left next to the right and left arrows and now I don't have a refresh key and the house is clear to the right. I understand good changes with software but when they start moving things around when you are use to them I hate that. I too tried to download the older version but I can't seem to do that. So I await an answer to your question.

Set whatever you want as your Homepage.
http://support.mozilla.com/en-US/kb/How+to+set+the+home+page

I Googled my question on how to make the home page a Google page and got that solved easily. As for getting the old version of Firefox, I think I'll muddle through with version 4 for a time, and if I don't like it I'll go back to IE.