How to build the output application to execution with xulrunner. We w…

…ill review this to make cfx more friendly or add a script to do this.

README.md

@@ -12,12 +12,25 @@ ultimate goal is to build your own browser using (mostly) standard web technolog
 
 ## Getting Started
 
+
 1. ./run
 
 or pass an argument for the files located inside the `./ui` directory
 
 2. ./run first_browser/index.html or ./run test_require/index.html
 
+## Background - Use of Addons SDK ( a.k.a. Jetpack SDK ) 
+
+This is a package and build system and the run script is based on the Mozilla Addon SDK ( http://github.com/mozilla/addon-sdk ). It uses cfx program to dynamically create a new profile, plus, it uses the ./template/app-extension and information fro the ./impl/packages/chromeless to build your application. When it builds, it calls firefox ( or XULRunner ) passing the application. 
+
+If you want to see the actual generated output and ship with XULRunner or to launch it directly from XULrunner, you need ( so far til we make it easier ) to call cfx using the "xpi" argument instead the "run" argument.  
+
+ ./impl/bin/cfx -a xulrunner -t ./template/app-extension --static-args {\"browser\":\first_browser/index.html\"} -p impl/packages/chromeless xpi
+
+This will generate an .xpi file. Create a new directory, enter it, unzip the xpi file into this directory, add the ../template/app-extension/application.ini file to it and launch with XULRunner: 
+
+ xulrunner ./application.ini
+
 ## What could go wrong?
 
 In order to work, you probably should make sure you've got ffx 3.6.x