User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.70 Safari/533.4 Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:2.0b1) Gecko/20100628 Firefox/4.0b1 After installing 4.0b1 candidate 1, about:plugins does not show all available plugins. On my machine, I see only the Java plugin. All other plugins like Flash etc. are not visible in Firefox, even though they are present in /Library/Internet-Plugins and can be seen in Chrome/Safari. Doing a manual install does not help, neither does installing via the plugin finder. Reproducible: Always Steps to Reproduce: 1. Install 4.0b1 candidate 1 2. Start browser 3. Go to about:plugins Actual Results: Only the java plugin is seen as available. Expected Results: All plugins should be seen as visible.

If you are using the 64-bit build this is currently expected. 32-bit plugins won't work in the browser. Java is the only major plugin vendor that ships a 64-bit plugin.

thanks for the info, kevin .. i will use the 32-bit build.