Technologies are provided for protecting nonintrusive content of a web page presented on a user device. A web page is received on a user device including instructions to monitor the web page for changes to the web page, and instructions to restore and freeze content of the web page when a modification has been detected. A content filter filters content on the web page. The filtering is detected on the user device, and the web page is restored with the original content of the web page and the content is frozen on the web page, preventing further modification of the web page.