I installed Flash Player for yum on Fedora 20 / Firefox 30, but it is not listed as plugin, even after restarting Firefox

[Guest]

what to check next?

[NerdyWasabi]

Have you verified that the installation was successful and that your browser does have the latest FP14 installed?  For reference sake - download the flash player again from this link - http://download.macromedia.com/pub/flashplayer/current/support/install_flash_player_osx.dm g.  This is the mac installer