diff --git a/popup.js b/popup.js
index 25d93f0..61c51e7 100644
--- a/popup.js
+++ b/popup.js
@@ -1,3 +1,6 @@
+const REVIEW_LINK_REGEX =
+    /^(?!.*(internal|googleplex))https:\/\/([a-zA-Z0-9-]+)-review\.googlesource\.com/g;
+
 function GerritBugReport(currentTab) {
   this.image = '';
   this.url = currentTab;
@@ -62,9 +65,11 @@
 document.addEventListener('DOMContentLoaded', function() {
   chrome.tabs.query({currentWindow: true, active: true}, function(tabs){
     const currentTab = tabs[0].url;
-    if (!currentTab.startsWith('https://gerrit-review.googlesource.com')) {
+
+    if (!currentTab.match(REVIEW_LINK_REGEX)) {
       return;
     }
+
     document.getElementById('error').classList.add('hidden');
     document.getElementById('gerritBugReport').classList.remove('hidden');
     const button = document.getElementById('screenshotBtn');