problem with firefox updating/install from file download

I have downloaded the firefox 3.7a which was a tar.bz2 file. After downloading extracted the tar.bz2 into a download folder. Now I can figure out to do from there. How can update using this firefox update. All the zypper/yast ect. only use my repositories that dont have 3.7a and I can not figure out what else to do. Google searches all just say use package manager. But how do you use a package manager for a file on your hard drive?

Is there a README or an INSTALL in the tarball? Have a look at these. Mozilla does not provide RPM packages, and that is the standard used by Yast/zypper.