Hello World (HW) App in Firefox OS

First I bought a Geeksphone keon.

Then study related works.

First FIrefox OS App in Six (x2) Minutes! : http://popcorn.webmadecontent.org/9wp
jQuery Mobile : http://jquerymobile.com/
App manifest : https://developer.mozilla.org/en-US/docs/Web/Apps/Manifest
Packaged apps : https://developer.mozilla.org/en-US/docs/Web/Apps/Packaged_apps
icons Basics : http://www.mozilla.org/en-US/styleguide/products/firefoxos/icons/

I write a sample code, that use Javascript alert function.
You must have three main file.

install.html :  Install the package app and callbacks for success and failure notification.
package.manifest : manifest.webapp and package.manifest had to "match".
package.zip : Your App package. Firefox OS can decompress this package.

Validate your App : https://marketplace.firefox.com/developers/validator
That my phone's screen image.