Dive into Mozilla Modifying Firefox using Extension Lab

Since I don't work with extension much myself, I've taken the easy way and followed the instructions. At first glance at the instructions, I thought to myself, "Oh man...this is gonna be one long lab".

After finished reading the entire lab, I was still a little confused, so I talked w/ Scott and he help clear things up for me. And now, the lab is clear as day.

I simply had to create 4 files and the right directory structure, copy and pasted the code, and voila, the lab is done =)

Lab 8
  |-install.rdf
  |-chrome.manifest
  |_chrome
      |_content
           |-addtabbeside.js
           |-overlay.xul

Extension file can be found here