postMessage-tracker-f

Name: postMessage-tracker-f
Rating: 5 (1 reviews)
Author: Hacks and Hops

Monitors postMessage usage (url, domain and stack) both by logging using CORS and also visually as an extension-icon. All credit goes to Frans Rosén.

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Features & Capabilities

postMessage-tracker-f is a Firefox extension designed to monitor postMessage listeners effectively. It provides a visual icon indicator displaying the number of active listeners in the current window, including all subframes, and highlights potentially vulnerable functions. This powerful tool logs detailed listener information—such as URL, domain, and call stack—via CORS to a configurable endpoint, enabling in-depth analysis of message event listeners, including short-lived and interaction-enabled ones.

Built as a super simple port of the original extension by Frans Rosén, postMessage-tracker-f supports unwrapping listeners wrapped by popular frameworks like Raven, New Relic, Rollbar, Bugsnag, and jQuery to reveal the actual listener functions. It also reroutes wrappers for clear DevTools console visibility. The extension aids developers and security professionals in auditing cross-window communication, detecting hidden or suspicious listeners, and enhancing web application security. Fully open-source, it encourages community contributions and bug reports through its GitHub repository.

User Growth & Download Statistics

Add-on Developer Tools Privacy & Security

By:

Daily users:

Rating:

Version:

1.1.2 Last updated: 2024-01-24

Version code:

5682120

Creation date:

2024-01-18

Risk:

Permissions:

tabs
storage
<all_urls>

Content scripts matches:

<all_urls>

Size:

30.74KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-18

Compare stats and ranking:

Ranking

# 9,407 ▼ 266

Other rankings

#6 in usage tracker keyword 27 ▼ 2

#11 in message keyword 30

#21 in messages keyword 24

#23 in post keyword 22

#35 in usage keyword 39 ▼ 1

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Hacks and Hops

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/postmessage-tracker-f/

Website:

https://github.com/ACK-J/postMessage-tracker-firefox/tree/master

Is postMessage-tracker-f Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

postMessage-tracker-f requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

postMessage-tracker-f has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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