diff --git a/js/chromium.js b/js/chromium.js
index 5d3e5ee2..47574a4d 100644
--- a/js/chromium.js
+++ b/js/chromium.js
@@ -275,7 +275,12 @@
     if (chrome.runtime.onInstalled) {
         chrome.runtime.onInstalled.addListener(function(options) {
             if (options.reason === 'install') {
+                console.log('new install');
                 extension.install();
+            } else if (options.reason === 'update') {
+                console.log('new update. previous version:', options.previousVersion);
+            } else {
+                console.log('onInstalled', options.reason);
             }
         });
     }