So its been a while… I was assigned a bug (https://bugzilla.mozilla.org/show_bug.cgi?id=705961) two weeks back and I haven’t been able to fix it. Frustrating… I have spent quite so time on it, but the structure of the classes and objects still puzzles me.
On another note, I have been able to find some nice documentation on how browsers work and we have been able to integrate some elements it the project plan which is due next week. Its worth taking a look, very well written and easily to understand:
http://www.html5rocks.com/en/tutorials/internals/howbrowserswork/
spartanfire 
But only a few days later and the patch got a positive review and your work is now shipping in Firefox Nightly and will appear in Firefox 21. Great job!
Thanks jaws!