diff --git a/extensions/chromium/runet-censorship-bypass/src/extension-common/11-error-handlers-api.js b/extensions/chromium/runet-censorship-bypass/src/extension-common/11-error-handlers-api.js
index aadbb7c..4f676f7 100644
--- a/extensions/chromium/runet-censorship-bypass/src/extension-common/11-error-handlers-api.js
+++ b/extensions/chromium/runet-censorship-bypass/src/extension-common/11-error-handlers-api.js
@@ -78,7 +78,8 @@
       openAndFocus(
         'http://rebrand.ly/ac-error/?json=' + encodeURIComponent(json) +
           (type ? '&type=' + encodeURIComponent(type) : '') +
-          '&version=' + chrome.runtime.getManifest().version
+          '&version=' + chrome.runtime.getManifest().version +
+          '&useragent=' + encodeURIComponent(navigator.userAgent),
       );
 
     },