Try restore your home page: *[https://support.mozilla.org/kb/How%20to%20set%20the%20home%20page How to set the home page] Try go to '''about:config''' search for '''browser.startup.homepage''' change its value to: '''about:home''' - default <br> '''about:blank''' - blank page <br> '''url''' - type a link that you want *[http://kb.mozillazine.org/About:config about:config] Also: *[https://support.mozilla.org/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in safe mode] *[https://support.mozilla.org/kb/troubleshoot-firefox-issues-caused-malware Problems caused by malwares] *[https://support.mozilla.org/kb/how-to-fix-preferences-wont-save Preferences won’t save] *[http://kb.mozillazine.org/Preferences_not_saved] *[https://support.mozilla.org/kb/reset-firefox-easily-fix-most-problems Reset Firefox]