What is the string in the '''browser.startup.homepage''' option on '''about:config''' page? *[http://kb.mozillazine.org/About:config about:config] Try start in Safe Mode, sometimes addons can be the cause of the problem: *[https://support.mozilla.org/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in safe mode] Related topics: *[https://support.mozilla.org/questions/983985 questions/983985] *[https://support.mozilla.org/en-US/questions/990608#answer-545438 990608]

hello lloyd, you have some malicious addons present. please try all these steps: # [[Reset Firefox – easily fix most problems|reset firefox]] (this will keep your bookmarks and passwords) # afterwards go to firefox > addons > extensions and in case there are still extensions listed there, disable them. # finally run a full scan of your system with different security tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes] and [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner] to make sure that adware isn't present in other places of your system as well. [[Troubleshoot Firefox issues caused by malware]]

This took care of the problem. Thanks!