added functionality to start caching icons

site/js/jibe.js

@@ -35,6 +35,20 @@ function getIconForSize(targetSize, app)
     return DEFAULT_ICON;
 }
 
+function cacheIcons () {
+    if (typeof window.applicationCache.mozAdd === 'function') {
+        Array.prototype.slice.call(document.getElementsByClassName('icon')).forEach(
+            function (icon_div) {
+                try {
+                    window.applicationCache.mozAdd(icon_div.firstElementChild.src);
+                } catch (err) {
+                    console.log(err);
+                }
+            }
+        );
+    }
+}
+
 $(document).ready(function() {
     /* IconGrid */
     var appCount = 0;
@@ -64,6 +78,7 @@ $(document).ready(function() {
               var pending = navigator.mozApps.mgmt.getAll();
               pending.onsuccess = function () {
                 gotApps(this.result);
+                cacheIcons();
               };
               pending.onerror = function () {
                 $('#help').hide();

site/manifest.webapp

@@ -0,0 +1,13 @@
+{
+  "version": "0.1",
+  "name": "Developer Preview Apps Dashboard",
+  "description": "Manage Installed Open Web Apps",
+  "installs_allowed_from": [
+    "https://myapps.mozillalabs.com/"
+  ],
+  "appcache_path": "/cache.manifest",
+  "icons": {
+    "16": "/icons/16px.png",
+    "256": "/icons/256px.png"
+  }
+}