''always opens up at http://www.searchqu.com/406 '' searchqu see https://support.mozilla.com/questions/854647 : home page keeps reverting to http://www.searchqu.com/406 : refers to :http://deletemalware.blogspot.com/2011/05/how-to-remove-searchqu-uninstall-guide.html Also see [/questions/816181] and [/questions/790833] Then if you need to change your home page see * How to set the home page | How to | Firefox Help *:https://support.mozilla.com/kb/How%20to%20set%20the%20home%20page