Submits the HTML of the current tab to the W3C Validator. Source submitted is from a GET request not the DOM. Written out of the need to easily validate protected directories. Not advisable for use on pages with sensitive information.
What is Validate HTML?
Validate HTML is a Firefox add-on designed to easily validate protected directories by submitting the HTML of the current tab to the W3C Validator. However, it is not recommended for use on pages with sensitive information.
Validate HTML is safe to use. It does not request any sensitive permissions.
Validate HTML has earned a fairly good reputation and likely can be trusted.