this fixes #397

Author: gorhill

js/contentscript-end.js

@@ -347,7 +347,14 @@ var cosmeticFiltering = (function() {
                 continue;
             }
             // id
-            v = nodes[i].id.trim();
+            v = nodes[i].id;
+            // https://github.com/gorhill/httpswitchboard/issues/397
+            // `id` can be something else than a string
+            if ( typeof v !== 'string' ) {
+                v = '';
+            } else {
+                v = v.trim();
+            }
             if ( v !== '' ) {
                 v = '#' + v;
                 if ( !qq[v] ) {

manifest.json

@@ -2,7 +2,7 @@
     "manifest_version": 2,
     "name": "__MSG_extName__",
     "short_name": "HTTPSB",
-    "version": "1.0.1.1",
+    "version": "1.0.1.2",
     "description": "__MSG_extShortDesc__",
     "icons": {
         "16": "icon_16.png",