gleeBox comes with a set of commands that allow you to traverse through different elements on a page, perform different types of actions on a page and supports commands from yubnub.org. A couple of examples include "?h" to scroll through headers on a page and ":fbshare $" to share the current page on Facebook.
If you're someone who is a keyboard junkie and loves the command line, install this extension!
For the complete set of commands, read the user manual at http://thegleebox.com/manual.html
You can also share and find tips, commands and more on http://tipjar.thegleebox.com