Web Developer Firefox Extension
The Web Developer extension for Firefox is one of the most comprehensive accessibility aids available. There are more than 150 tools and features that reside within twelve categories that can be accessed through a drop down menu, or you can use the toolbar that comes along with the extension that can be toggled to be viewable or not.
Choose from the following to view a listing of the features that Web Developer offers.
Of course you are free to save and/or share the list.
Shared under the following licence.
Attribution-NonCommercial-ShareAlike 3.0 Unported.