Add reference links and basic build instructions

Author: stembrain

README.md

@@ -2,3 +2,12 @@ Firefox-Mid-Monitor
 ===================
 
 This is a Firefox XPI extension that adds extra height to the window so content can be scrolled to the middle of your monitor.
+
+To build the project, install the cfx tool first. Then run 'cfx xpi' from the root of this repo
+
+
+References:
+https://developer.mozilla.org/en-US/Add-ons/SDK/Tutorials/Getting_started
+https://developer.mozilla.org/en-US/Add-ons/SDK/Tutorials/Modifying_the_Page_Hosted_by_a_Tab
+https://developer.mozilla.org/en-US/Add-ons/SDK/High-Level_APIs/page-mod
+https://developer.mozilla.org/en-US/Add-ons/SDK