Hi, Please try this: '''Help''' ('''Alt''' + '''H''') > '''Troubleshooting Information''', click '''Open Containing Folder'''. This opens your [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder & Files]. Exit Firefox and rename '''cert8.db''', '''secmod.db''' and '''key3.db''' in the profile folder. You can delete them later. ............................................................................................................................... Useful links: [https://support.mozilla.com/en-US/kb/Options%20window All about Tools > Options] [http://kb.mozillazine.org/About:config Going beyond Tools > Options - about:config] [http://kb.mozillazine.org/About:config_entries about:config Entries] [https://support.mozilla.com/en-US/kb/Page%20Info%20window Page Info] Tools (Alt + T) > Page Info, Right-click > View Page Info [https://support.mozilla.com/en-US/kb/Keyboard%20shortcuts Keyboard Shortcuts] [https://support.mozilla.com/en-US/kb/Viewing%20video%20in%20Firefox%20without%20a%20plugin Viewing Video without Plugins] [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder & Files] [https://developer.mozilla.org/en/Command_Line_Options#Browser Firefox Commands] [https://support.mozilla.com/en-US/kb/Basic%20Troubleshooting Basic Troubleshooting] [https://support.mozilla.com/en-US/kb/common-questions-after-upgrading-firefox-36 After Upgrading] [https://support.mozilla.com/en-US/kb/Safe%20Mode Safe Mode] [http://kb.mozillazine.org/Problematic_extensions Problematic Extensions] [https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes Troubleshooting Extensions and Themes] [https://support.mozilla.com/en-US/kb/Troubleshooting%20plugins Troubleshooting Plugins] [http://kb.mozillazine.org/Testing_plugins Testing Plugins]

Don't include key3.db because that file has nothing to do with that problem and you will lose access to all passwords that are saved in the password manager if you remove the key3.db file.<br /> Removing the other mentioned files (secmod.db and cert8.db).<br /> Start with secmod.db and if that still gives the error message then also remove cert8.db (stored intermediate certificates). See also: *https://support.mozilla.org/kb/Could+not+initialize+the+browser+security+component