Perform the suggestions mentioned in the following articles: * [https://support.mozilla.com/en-US/kb/Template:clearCookiesCache/ Clear Cookies & Cache] * [[Troubleshooting extensions and themes]] Check and tell if its working. ------------------------------------------------------------------------------------------ Might not be related to your problem but some of your Plugins are out-dated * Update All your Firefox Plugins -> [https://www.mozilla.org/en-US/plugincheck/] * '''When Downloading Plugins Update setup files, Remove Checkmark from Downloading other Optional Softwares with your Plugins (e.g. Toolbars, McAfee, Google Chrome, etc.)''' ------------------------------------------------------------------------------- Also see this -> https://real.custhelp.com/app/answers/detail-dl/a_id/8883/related/1/kw/realdownloader%20not%20working%20with%20latest%20firefox