Safari browser - Google search engine haunted by Yahoo.
In Safari my Google search engine is 'haunted' by Yahoo which immediately overtakes it when Google is selected. I have tried know re-sets and checked preferences/plug-ins/extensions and discovered that Firefox is fault free, so it must be Safari. I believe it is a hidden 'spigot search' extension but am reluctant to use a Malware programme. Does anyone have another solution? Thank you.
MacBook Pro (13-inch Mid 2012), iOS 9.3.2