Who is postMessage Tracker for?

postMessage Tracker is an open-source project built for web developers and security researchers.

What platforms does postMessage Tracker run on?

postMessage Tracker runs on the web and embeddable surfaces.

Is postMessage Tracker still maintained?

Unverified. postMessage Tracker has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to postMessage Tracker?

Similar projects tracked by PulseGate include FancyTracker, Fransyfox, and Email Tracker for Firefox.

Who makes postMessage Tracker?

postMessage Tracker is developed by ACK-J.

How long has postMessage Tracker been around?

postMessage Tracker first shipped in 2024.

Back to the index

postMessage Tracker

Name: postMessage Tracker
Author: ACK-J

github.comBrowser DevTools & extensions

postMessage Tracker is an open-source Firefox extension that monitors postMessage usage, including URLs, domains, and call stacks. It logs activity and provides visual indicators through the browser extension icon for developers and security researchers.

Open SourceWebEmbeddable

Visit github.com

Overview

6 features

postMessage Tracker sits in PulseGate's Browser DevTools & extensions category. It focuses on tracking and debugging postMessage communication between web pages and domains. postMessage Tracker is an open-source project aimed at web developers and security researchers. postMessage Tracker is open source under the Open Source license. It runs on the web and embeddable surfaces.

Behind postMessage Tracker is ACK-J, and it first shipped in 2024. Key capabilities include message logging, domain tracking, and URL tracking.

Summary written by a language model from the project’s public pages.

Message logging
Domain tracking
URL tracking
Stack tracing
Visual indicators
CORS logging

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed11 Sep · 11:33 UTC
postMessage-tracker-f verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about postMessage Tracker

What is postMessage Tracker?: PostMessage Tracker focuses on tracking and debugging postMessage communication between web pages and domains. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is postMessage Tracker for?: postMessage Tracker is an open-source project built for web developers and security researchers.
Is postMessage Tracker free?: Yes — postMessage Tracker is open source under the Open Source license and free to use.
What platforms does postMessage Tracker run on?: postMessage Tracker runs on the web and embeddable surfaces.
Is postMessage Tracker still maintained?: Unverified. postMessage Tracker has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to postMessage Tracker?: Similar projects tracked by PulseGate include FancyTracker, Fransyfox, and Email Tracker for Firefox.FancyTracker Fransyfox Email Tracker for Firefox
Who makes postMessage Tracker?: postMessage Tracker is developed by ACK-J.
How long has postMessage Tracker been around?: postMessage Tracker first shipped in 2024.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
Built for: web developers and security researchers
Model: Open source
Solves: Tracking and debugging postMessage communication between web pages and domains.

Registered as

Firefox Add-ons: postmessage-tracker-f

Developer

ACK-J

Index record

Indexed: 11 Sep 2026
Lifecycle: Alive
Last seen: 11 Sep 2026

Identity audit (13)

Slug: postmessage-tracker-f-github-com
Lifecycle state recorded: 11 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 11 Sep 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 11 Sep 2026
Canonical URL: https://github.com/ACK-J/postMessage-tracker-firefox/tree/master

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