Fransyfox focuses on inspecting and tracking postMessage communication in Firefox extensions and web pages. It is catalogued under Browser DevTools & extensions on PulseGate.

Who should use Fransyfox?

Fransyfox is an open-source project built for web security researchers and browser extension developers.

Yes — Fransyfox is open source under the Open Source license and free to use.

What platforms does Fransyfox run on?

Fransyfox runs on the web, the command line, embeddable surfaces, macOS, and Windows.

Is Fransyfox still maintained?

Unverified. Fransyfox 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.

Fransyfox is developed by GangGreenTemperTatum.

How long has Fransyfox been around?

Fransyfox first shipped in 2026.

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Fransyfox

Name: Fransyfox
Author: GangGreenTemperTatum

github.comInfrastructure

Fransyfox is an open-source Firefox-compatible adaptation of postMessage-tracker and FancyTracker. It helps security researchers and browser developers inspect postMessage activity in web pages and extensions.

Open SourceWebCLIEmbeddablemacOSWindowsLinux

Visit github.com

Overview

5 features

Fransyfox is a Browser DevTools & extensions project. It focuses on inspecting and tracking postMessage communication in Firefox extensions and web pages. Fransyfox is an open-source project aimed at web security researchers and browser extension developers. Fransyfox is open source under the Open Source license. It ships for the web, the command line, embeddable surfaces, macOS, and Windows.

Behind Fransyfox is GangGreenTemperTatum, and it first shipped in 2026. Among its 5 catalogued features are postMessage Tracking, Firefox Support, and Message Inspection.

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

postMessage Tracking
Firefox Support
Message Inspection
Browser Extension
NPM Installation

Built with & integrations

Runs on

BrowserCLIEmbeddablemacOSWindowsLinux

Trust & compliance

License

Open Source

Verified signals

HTTPSOpen SourceFree tierStore-verified publisher

Indexing history

What PulseGate has recorded for this listing

Indexed11 Sep · 01:22 UTC
Fransyfox verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Fransyfox

What is Fransyfox?: Fransyfox focuses on inspecting and tracking postMessage communication in Firefox extensions and web pages. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Fransyfox?: Fransyfox is an open-source project built for web security researchers and browser extension developers.
Is Fransyfox free?: Yes — Fransyfox is open source under the Open Source license and free to use.
What platforms does Fransyfox run on?: Fransyfox runs on the web, the command line, embeddable surfaces, macOS, and Windows.
Is Fransyfox still maintained?: Unverified. Fransyfox 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.
Who makes Fransyfox?: Fransyfox is developed by GangGreenTemperTatum.
How long has Fransyfox been around?: Fransyfox first shipped in 2026.
Is Fransyfox open source?: Yes — Fransyfox is open source under the Open Source license.

At a glance

Pricing: Open Source
Platforms: Web · CLI
Languages: English
License: Open Source
First seen: 11 Sep 2026
Built for: web security researchers and browser extension developers
Model: Open source
Solves: Inspecting and tracking postMessage communication in Firefox extensions and web pages.

Registered as

Firefox Add-ons: fransyfox

Developer

GangGreenTemperTatum

Index record

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

Identity audit (13)

Slug: fransyfox-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 (no inferred launch/funding milestones).
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/GangGreenTemperTatum/Fransyfox

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