diff --git a/www/index.html b/www/index.html
index 8393f02c..f46865a2 100644
--- a/www/index.html
+++ b/www/index.html
@@ -51,8 +51,11 @@ License:
 	Current status : I have tested it with the <a href="http://evopedia.info/dumps/wikipedia_small_2010-08-14.torrent">small dump (2010-08-14)</a>, the <a href="http://evopedia.info/dumps/wikipedia_fr_2012-02-03.torrent">French dump (2012-02-03)</a> and the <a href="http://evopedia.info/dumps/wikipedia_frwiktionary_2011-03-16.torrent">French wiktionary dump (2011-03-16)</a>. <b>It does NOT work on the English dump for now</b> (I'm working on it)
 	<br />
 	<br />
-	On desktops, it works at least on Firefox 17 and Chrome 23. I tested it on the Firefos OS simulator : it works but requires (for now) to put the small dump files in the "Music" folder of your device. It looks for wikipedia_small_2010-08-14/titles.idx in it. So far, I could not test it on a real Firefox OS device.
-	<b>Update 2013-01-25 : </b> it's now broken on latest Firefox OS, because of more strict security policy on accessing the local data. You now need to have at least a privileged webapp to have this right. Cf <a href="https://docs.google.com/a/mozilla.com/spreadsheet/ccc?key=0Akyz_Bqjgf5pdENVekxYRjBTX0dCXzItMnRyUU1RQ0E#gid=0">https://docs.google.com/a/mozilla.com/spreadsheet/ccc?key=0Akyz_Bqjgf5pdENVekxYRjBTX0dCXzItMnRyUU1RQ0E#gid=0</a>
+	<ul>
+	<li>On desktops, it works at least on recent Firefox and Chrome</li>
+	<li>On the Firefos OS simulator, you have (for now) to put the small dump files in a "fake-sdcard" folder of your firefox profile (ex : ~/.mozilla/firefox/xxxx.default/extensions/r2d2b2g@mozilla.org/profile/fake-sdcard). It looks for wikipedia_small_2010-08-14/titles.idx in it. You also need to install the application from the dashboard of the simulator instead of accessing via the browser (due to security restrictions in Firefox OS : only certified webapps can access the sdcard)</li>
+	<li>I could not test it on a real Firefox OS device : if someone did, please let me know</li>
+	</ul>
 	<br />
 	It's only a proof of concept sor far : there are certainly many many ways this could be enhanced (suggestions and patche are welcome : the source code is on <a href="https://github.com/mossroy/evopedia-html5">github</a>). In particular, the performance can be optimized when reading an article, and the links inside an article do not work for now.
 	<br />
diff --git a/www/js/app.js b/www/js/app.js
index a0aa6d80..87fc6068 100644
--- a/www/js/app.js
+++ b/www/js/app.js
@@ -42,7 +42,7 @@ onKeyUpPrefix(e)
 
 var storage = null;
 if (typeof navigator.getDeviceStorage == "function") {
-	storage = navigator.getDeviceStorage('music');
+	storage = navigator.getDeviceStorage('sdcard');
 }
 
 if (storage != null) {
diff --git a/www/manifest.webapp b/www/manifest.webapp
index 72e471ad..864e68d3 100644
--- a/www/manifest.webapp
+++ b/www/manifest.webapp
@@ -19,5 +19,12 @@
       "description": "Lecteur Wikipedia hors-connexion"
     }
   },
-  "default_locale": "en"
+  "default_locale": "en",
+  "permissions": {
+    "device-storage:sdcard": {
+      "description": "Required to read wikipedia dumps",
+      "access": "readonly"
+      }
+  },
+  "type": "privileged"
 }