Now Krause is back with a new tool that lets anyone see JavaScript commands injected through an in-app browser.

What you may not know is it also features a command line and API for heavy-duty debugging. Firebug is a Firefox extension used by web developers for debugging HTML, CSS, JavaScript and the browser's ...

What is a Bookmarklet? The term bookmarklet comes from the words bookmark and applet, and is a browser bookmark that contains JavaScript commands to extend the browser’s functionality.