diff --git a/www/common/cryptpad-common.js b/www/common/cryptpad-common.js
index 424c5bf52..0fdd19b5f 100644
--- a/www/common/cryptpad-common.js
+++ b/www/common/cryptpad-common.js
@@ -167,6 +167,12 @@ define([
         feedback(pattern);
     };
 
+    common.reportScreenDimensions = function () {
+        var h = window.innerHeight;
+        var w = window.innerWidth;
+        feedback('DIMENSIONS:' + h + 'x' + w);
+    };
+
     common.getUid = function () {
         if (store && store.getProxy() && store.getProxy().proxy) {
             return store.getProxy().proxy.uid;
@@ -1484,6 +1490,8 @@ define([
                 feedback("NO_ISARRAY");
             }
 
+            common.reportScreenDimensions();
+
             $(function() {
                 // Race condition : if document.body is undefined when alertify.js is loaded, Alertify
                 // won't work. We have to reset it now to make sure it uses a correct "body"