diff --git a/js/threex.mozillaWebStoreInstall.js b/js/threex.mozillaWebStoreInstall.js
new file mode 100644
index 0000000..182e61b
--- /dev/null
+++ b/js/threex.mozillaWebStoreInstall.js
@@ -0,0 +1,43 @@
+// This THREEx helper makes it easy to handle navigator.mozApps API.
+// * https://developer.mozilla.org/en/Apps/Apps_JavaScript_API
+// 
+// # Code
+
+//
+
+
+/** @namespace */
+var THREEx			= THREEx 			|| {};
+THREEx.MozillaWebStoreInstall	= THREEx.MozillaWebStoreInstall	|| {};
+
+/**
+ * test if the API is available
+ * @returns {Boolean} true if the API is available, false otherwise
+*/
+THREEx.MozillaWebStoreInstall.apiAvailable	= function()
+{
+	return navigator.mozApps ? true : false;
+}
+
+/**
+ * Test if the application is already installed
+ * 
+ * @returns {Boolean} true if the application is installed, false otherwise
+*/
+THREEx.MozillaWebStoreInstall.isInstalled	= function(callback)
+{
+	if( !this.apiAvailable() )	return false;
+	navigator.mozApps.amInstalled(callback);
+}
+
+/**
+ * Trigger an installation
+ * @param {String} url of the application (optional)
+ * @param {Function} callback called if installation succeed
+ * @param {Function} callback called if installation failed
+*/
+THREEx.MozillaWebStoreInstall.install	= function(url, callback)
+{
+	console.assert( this.apiAvailable() )
+	navigator.mozApps.install(url, successCallback, failureCallback);
+}
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