flash player installation help Red Hat linux

I am trying to install flash player for Firefox in Red Hat Enterprise Linux WS release 4 (Nahant Update 5). I downloaded the rpm, and ran the command:

[root@localhost Desktop]# rpm -Uvh adobe-release-i386-1.0-1.noarch.rpm
warning: adobe-release-i386-1.0-1.noarch.rpm: V3 DSA signature: NOKEY, key ID f6777c67
Preparing...                ########################################### [100%]
   1:adobe-release-i386     ########################################### [100%]

To me this seems to have completed the install. However in the Adobe instructions:

Installation instructions for .rpm

1. Click the download link to begin installation. A dialog box will appear asking                       you where to save the file.
2. Save the .rpm file to your desktop and wait for the file to download                       completely.
3. In terminal, navigate to the desktop and type # rpm -Uvh <rpm_package_file>.                       Click                       Enter. (Note: This must be done as a root user). The installer                       will instruct you to shut down your browser(s).
4. Once the installation is complete, the plug-in will be installed in your Mozilla browser. To verify, launch Mozilla and choose Help > About Plug-ins from the browser menu.

http://www.adobe.com/products/flashplayer/productinfo/instructions/

I was never prompted to restart my browser and the flash player is still not installed for firefox even when i restarted manually. I am running as the root user.