My default search engine changed to startpaage, NOT AT MY REQUEST. I have deleted startpage from the search engine options, but I can find no way to add duckduckgo to the options. I haave gone to settings:search engine. The pull down for default search engine shows only Bing, Yahoo! and Google. I have gone to Settings:Search Engine:Manage Search Engines but I can find no wayh to add a search engine on that page. Only the same three choices, Bing, Google and Yahoo.