Download of tidy_firefox_macintel_0795.xpi (tidy_firefox_macintel_0795.xpi ( external link: SF.net): 460,380 bytes) will begin shortly. If not so, click link on the left.
HTML Validator is an Mozilla extension that adds HTML validation to Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon in the status bar when browsing. The details are seen when looking the HTML source of the page.
