Troubleshooting extensions and themes * https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes 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.) Clear Cookies & Cache * https://support.mozilla.com/en-US/kb/Template:clearCookiesCache Clear the Network Cache * https://support.mozilla.com/en-US/kb/How%20to%20clear%20the%20cache#w_clear-the-cache Troubleshooting plugins * https://support.mozilla.com/en-US/kb/Troubleshooting%20plugins Check and tell if its working.