If searches from a new tab page are being redirected through the site Catstart.com, then you have a browser extension or addon installed that is performing these redirects. Some extensions will cause searches from your browser's address bar or from a new tab page to redirect through https://catstart.com/search.php?q=[search-query], which currently redirects to Google.com.
This article was published first at Remove the Catstart.com Search Redirect
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This article was published first at Remove the Catstart.com Search Redirect
Click here to view the article.