Hello, Crashes or other problems with certain multimedia content in Firefox (such as Youtube videos and Flash animations or games) can often be resolved by performing the steps in these Knowledge Base articles: * [[Flash Plugin - Keep it up to date and troubleshoot problems]] * [[Flash 11.3 crashes]] * [[Flash 11.3 doesn't load video in Firefox]] On Windows Vista and above, you can disable Flash protected mode by following the instructions on these pages: * http://forums.adobe.com/thread/1018071#TemporaryWorkaround * http://kb.mozillazine.org/Flash#Disabling_Protected_Mode_in_Flash_11.3 (See [http://blogs.adobe.com/asset/2012/06/inside-flash-player-protected-mode-for-firefox.html this Adobe blog post] for technical details about Flash protected mode.) For recent updates for Adobe Shockwave Flash, please update your version to 14. Please refer to the security updates [http://helpx.adobe.com/security/products/flash-player/apsb14-18.html and Adobe Security Bulletin] for more information. <!--Please also note that html5 may need to be enabled to view some videos on youtube [https://www.youtube.com/html5]--> <!--[version 13]Please refer to these security issues [http://helpx.adobe.com/security/products/flash-player/apsb14-13.html and Adoble Blog post] for more information on the security update. --> Please tell us if this helped!

What Flash version do you have installed? Did you check in "Firefox/Tools > Add-ons > Plugins" that the plugin is enabled? Note that a 32 bit Firefox version needs a 32 bit Flash. You can find the latest Flash player versions for Firefox on this page: *http://www.adobe.com/special/products/flashplayer/fp_distribution3.html See also: *http://kb.mozillazine.org/Determining_plugin_directory_on_Linux *https://developer.mozilla.org/Add-ons/Plugins/Gecko_Plugin_API_Reference/Plug-in_Basics#How_Gecko_Finds_Plug-ins