Enabling Flash Plugin
Fedora includes swfdec and gnash, which are free and open source implementations of Flash. We encourage you to try either of them before seeking out Adobe's proprietary Flash Player plug-in software. The Adobe Flash Player plug-in uses a legacy sound framework that does not work correctly without additional support. Run the following command to enable this support:
su -c 'yum install libflashsupport'
If you are using Flash 10, you do not need libflashsupport anymore as the usage of ALSA has been fixed in this version.
Users of Fedora x86_64 must install the nspluginwrapper.i386 package to enable the 32-bit Adobe Flash Player plug-in in Firefox, and the libflashsupport.i386 package to enable sound from the plug-in.
Install the nspluginwrapper.i386, nspluginwrapper.x86_64, and libflashsupport.i386 packages:
su -c 'yum install nspluginwrapper.{i386,x86_64} libflashsupport.i386'
Install flash-plugin after nspluginwrapper.i386 is installed:
su -c 'yum install libflashsupport'
Run mozilla-plugin-config to register the flash plugin:
su -c "mozilla-plugin-config -i -g -v"
Close all Firefox windows, and then relaunch Firefox. Type about:plugins in the URL bar to ensure the plugin is loaded.