HTML5 Outliner 0.2.1 No Restart
Displays the HTML5 document outline of the current web page. HTML5 Outlines are composed of labels for important structural elements (e.g., heading text, table titles, form titles etc).
Source Code: https://github.com/arky/html5-outliner-addon
This add-on has been preliminarily reviewed by Mozilla. Learn more
This add-on is not compatible with your version of Firefox because of the following: