Does your default search engine get changed to fireseerch.com? If so, a browser hijacker is causing these redirects. Fireseerch.com is found to be a browser hijacker which will attempt to commandeer your browser search and homepage. Its search results will send you to malicious websites to get money from you or infect your computer further. It may also prevent you from changing your settings back.
Fireseerch.com is usually installed through bundled software without you knowing. Remove it immediately.