You can increase the plugin timeout to help avoid this. However, if you do so, it will take longer for Firefox to detect if the Flash process does hang or crash. In the Location bar, type about:config and press Enter Return . The about:config "This might void your warranty!" warning page may appear. Click I'll be careful, I promise!, to continue to the about:config page. The about:config page should appear. In the Filter box, type dom.ipc.plugins.timeoutSecs Double click the setting and increase the number to 30 to have Firefox wait longer before shutting down Flash. if you r using mozilla this is the problem the new mozilla firefox times out after 10 seconds but the facebook games sometimes take longer to load so u will need to increase ur plugin timeout...worked for me.....
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