Looking at SeaMonkey Code

As you may know my project for OSD600 is moving tabs from one SeaMonkey browers to another SeaMonkey browser.

The Bug
https://bugzilla.mozilla.org/show_bug.cgi?id=449728

This is a standard in FireFox so this project is copying a pasting code and making it work. The problem is SeaMonkey and FireFox is millions of lines of code. I was told a good place to start is the comm-central tree in the file tabbrowser.xml. There i found the following functions addtab, removetab, movetabto.

TabBrowser.xml
http://mxr.mozilla.org/comm-central/source/suite/browser/tabbrowser.xml

Now i need to find where FireFox handles tabs