Released Adobe Flash 11.9 beta

I don't know if you can download just a plugin or not. I used this site or the one in the original post, unchecked the McAfee Security Scan Plus option (don't like programs that install other programs). The plugin is contained in the full installation version.

http://get.adobe.com/flashplayer/

Then check the addons for Firefox with this page:

http://www.mozilla.org/en-US/plugincheck/