Update readme

Author: janodvarko

MessageManager/README.md

@@ -1,18 +1,23 @@
 Message Manager
 ===============
 An example extension showing how to communicate between a chrome scope
-(extension) and content scope (panel ifreame with type="content")
+(extension) and content scope (panel iframe with type="content")
 
 Instructions
 ------------
 1. Install the extension
-2. Open developer tools toolbox (F12 or Menu -> Developer -> Toogle Tools)
-3. See the `My Panel` panel
+2. Open developer tools Toolbox (F12 or Menu -> Developer -> Toogle Tools)
+3. Open Browser Console (Menu -> Developer -> Browser Console))
+4. Select the `My Panel` panel
+5. You should see "Message from chrome: Hello from chrome scope!" in the console
+6. Click anywhere in the panel content
+7. You should see "Message from content: Hello from content scope!" in the console
 
 Further Resources
 -----------------
+* Firebug.next: https://github.com/firebug/firebug.next
+* DevTools Extension Examples: https://github.com/firebug/devtools-extension-examples
 * Add-on SDK: https://developer.mozilla.org/en-US/Add-ons/SDK
 * DevTools API: https://developer.mozilla.org/en-US/docs/Tools/DevToolsAPI
 * Coding Style: https://github.com/mozilla/addon-sdk/wiki/Coding-style-guide
-* DevTools Extension Examples: https://github.com/firebug/devtools-extension-examples
 * DevTools/Hacking: https://wiki.mozilla.org/DevTools/Hacking