The Web Developer extension adds a menu and a toolbar to the browser with various web developer tools.
- The cookies features provide various cookie related tools including disabling, adding and viewing cookies.
- The CSS features provide various tools related to the CSS on the page including displaying the styles applied to the selected element and live editing of the CSS.
- The forms features provide the ability to manipulate the forms on the page including display the form details and populating form fields.
- The images features provide various image related tools including finding broken images and outlining images.
- The information features provide various informational tools including displaying element information and viewing the document size.
- The miscellaneous features provide various tools including displaying a ruler and live editing of the HTML.
- The outline features allow the outlining of various elements including block level and positioned elements.
- The tools features allow an unlimited number of configurable tools including validating the CSS and the HTML.