A media and method for detecting third-party content in web pages is provided. Computer software operates on a server or a client-side computer to identify and analyze third-party links and contents in web pages to determine if a third-party content sill exists, is available, has changed, or disrupts a web browser. A third-party link or content can be removed, changed, or replaced. A user can be notified or given an option to handle changed third-party content. The server may remove the third-party link or content by changing an HTML file for the web page. The client-side computer may remove the third-party link or content by dynamically changing the rendered web page before it is displayed to the user.