Nav-goo.com is a malicious search webpage looking and functioning like a familiar search engine with useful functions. This hijacker comes bundled with freeware via its installers, web-clients and other special software, without user consent. It changes browser default homepage, search engine and other settings.
Search.instasrch.com is another browser hijacker, changing browser settings, including the default search engine and replacing the homepage on http://search.instasrch.com/search. These changes can not be undone later.
If you notice that your browser homepage is changed to https://bronav.com, then this probably means that your PC is infected with Bronav.com browser hijacker. Bronav.com comes in the form of a browser extension and changes the settings of your browsers.
Search.stosgame.com search page changes the homepage in all your browsers on http://search.stosgame.com/. According to the developers, this is designed to improve the quality of search and experience of browsing. However, this is a lie.
Search.hinstantgamesnow.com is a browser hijacker, positioning itself as a useful search page, providing quick access to sites dedicated to arcade games and other game content. Also, the developers claim that Search.hinstantgamesnow.com has the functions of a conventional search engine, improving the quality of search results.