Re: When selecting a new tab that shows recent websites feature is not working. Only searchqu.com comes up, even after I followed the directions about:config, etc.
hello dolphingirl419, please go to firefox > addons > extensions & remove any suspicious entries (toolbars, things that you have not installed intentionally, etc). also go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there and to a full scan of your system with the security software that you have in place.
then go to firefox > help > troubleshooting information > "profile folder - show folder". a new window should open up - in case it does contain a file named user.js, please delete that and restart the browser.
you could also install the searchreset addon afterwards, it will revert the settings that those kind of adware usually modifies to their default.