I am all about Firefox Addon Dev and helping others with their own FF addons. Especially bootstrapped addons but I can help out with the SDK to some extent.
Check out my website to find resources for FF Addon Dev (@Gists), my released addons (@AMO), and current addons in progress (@GitHub).
I am a huge fan of teaching others, so I like to update MDN. I wish MDN had a thing like Microsoft's MSDN, where people can vote sections as useful. That would make MDN contributors feel like accomplished, knowing that stuff they wrote is helping people out.
Noitidart is a very helpful add-on developer supporting other developers on IRC and with documentation on MDN.
MDN contributor, especially in add-ons and XPCOM topics.
Awesome Stackoverflow and IRC contributor for extension development: * http://stackoverflow.com/users/1828637/noitidart