What we have just done is install the repositories file, if you check /etc/yum.repos.d, you should see adobe-linux-i386.repo. This allows Fedora update manager to automatically update our copy of flash player should new version is available. To complete this part we have to import GPG key, thus say:
Now to install the plugin do:
You can check if the plugin is working by hitting this link, http://www.adobe.com/software/flash/about/.