US Patent 10902135 Thwarting data leakage from a webpage

Thwarting data leakage from a webpage. In some embodiments, a method may include detecting, at a browser on the network device, a visit to the webpage, directing a headless browser on the network device to visit the webpage in parallel to the browser visiting the webpage, detecting, at the headless browser, data leakage from the webpage, presenting, at the browser, a notification regarding the data leakage that allows a user to indicate whether the data leakage should be allowed, receiving, at the browser, an indication that the data leakage should not be allowed, and in response to receiving the indication that the data leakage should not be allowed, thwarting the data leakage by performing a remedial action at the network device to protect the network device from the data leakage.