diff --git a/browser-extensions.json b/browser-extensions.json
index 704230f5..d880d165 100644
--- a/browser-extensions.json
+++ b/browser-extensions.json
@@ -1,5 +1,5 @@
-{
-  "nordpass": {
+[
+  {
     "name": "NordPass",
     "message": "NordPass performs polyfill-like transformations on navigator.credentials, affecting tests for the CredentialsContainer API.",
     "affectedTests": ["api.CredentialsContainer"],
@@ -7,4 +7,4 @@
     "firefoxId": "0ff38d7a-db91-4a1a-a222-00f10d098b22",
     "safariId": "9F9F9D62-DE32-4B4F-88FD-63D448DACFDC"
   }
-}
+]
diff --git a/static/resources/harness.js b/static/resources/harness.js
index a759ac12..d51f5f1d 100644
--- a/static/resources/harness.js
+++ b/static/resources/harness.js
@@ -1747,9 +1747,15 @@
         renderHarnessLink(resultsEl);
 
         // Render code and support for reusable instances
-        var reInstKeys = Object.keys(reusableInstances.__sources);
-        for (var i = 0; i < reInstKeys.length; i++) {
-          renderReInstReportEl(reInstKeys[i], resultsEl);
+        for (var key in reusableInstances.__sources) {
+          if (
+            Object.prototype.hasOwnProperty.call(
+              reusableInstances.__sources,
+              key
+            )
+          ) {
+            renderReInstReportEl(reusableInstances.__sources[key], resultsEl);
+          }
         }
 
         // Add divider
diff --git a/views/extensioncheck.ejs b/views/extensioncheck.ejs
index 0f118cac..7efb19e4 100644
--- a/views/extensioncheck.ejs
+++ b/views/extensioncheck.ejs
@@ -111,13 +111,11 @@ See the LICENSE file for copyright details
         return;
       }
 
-      var extensionsToCheck = Object.keys(extensions);
-      var remaining = extensionsToCheck.length;
+      var remaining = extensions.length;
 
       var foundExtensions = [];
 
-      extensionsToCheck.forEach(function(k) {
-        var extension = extensions[k];
+      extensions.forEach(function(extension) {
         checkExtension(extension, function(result) {
           if (result) {
             foundExtensions.push(k);