showHTML от freginold

showHTML is a browser extension for developers and those who are curious about web page setup. It places a small text stripe at the top or bottom of any web page. As elements on the page are hovered over, details about each HTML element are displayed, including tag name, ID (if any) and classes (if any). You can move the stripe while in use; clicking on the text stripe will toggle it between the top and bottom of the browser window.