Is postMessage-catcher safe?

Clean risk

postMessage-catcher logs page postMessage data and URLs to the browser console when its catcher is enabled.

It runs a content script on all sites and, when the saved switch is on, records received window messages with the current page URL, origin, source, and message data. It also injects a page script that wraps iframe postMessage calls and logs the iframe URL plus message arguments locally in the console.

yangjinv2.0.0Chrome Web Store
0Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 2.0.0. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Store data in your browser

    storage

Updated 30 September 2026henlmhlhpgnkeecjjcbhhcfmecohnilo