How do I install the Flash plugin? * https://support.mozilla.com/en-US/kb/installing-flash * Remove Checkmark from Downloading other Optional Softwares with your Plugins (e.g. Toolbars, McAfee, Google Chrome, etc.) Managing the Flash plugin * https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin Check and tell if its working. Also, Update All your Firefox Plugins: * https://www-trunk.stage.mozilla.com/en-US/plugincheck/ * http://www.mozilla.com/en-US/plugincheck/ ** Remove Checkmark from Downloading other Optional Softwares with your Plugins (e.g. Toolbars, McAfee, Google Chrome, etc.)