diff --git a/platform/chromium/vapi-webrequest.js b/platform/chromium/vapi-webrequest.js
index d57f2e2fe..8fa29324e 100644
--- a/platform/chromium/vapi-webrequest.js
+++ b/platform/chromium/vapi-webrequest.js
@@ -109,7 +109,8 @@ vAPI.net.registerListeners = function() {
         // the URL of the origin from which the network request was made.
         if (
             details.tabId === vAPI.noTabId &&
-            typeof details.initiator === 'string'
+            typeof details.initiator === 'string' &&
+            details.initiator !== 'null'
         ) {
             details.tabId = vAPI.anyTabId;
             details.documentUrl = details.initiator;