What is Tracker Flag?

Tracker Flag focuses on identifying tracking query parameters in URLs without modifying the original link. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is Tracker Flag for?

Tracker Flag is an open-source project built for privacy-conscious Firefox users.

What platforms does Tracker Flag run on?

Tracker Flag runs on the web, embeddable surfaces, macOS, Windows, and Linux.

Is Tracker Flag still maintained?

Unverified. Tracker Flag 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 develops Tracker Flag?

Tracker Flag is developed by John G. Jones.

When did Tracker Flag launch?

Tracker Flag first shipped in 2026.

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Tracker Flag

Name: Tracker Flag
Author: John G. Jones

mozilla.orgBrowser DevTools & extensions

Tracker Flag is a Firefox extension that examines pasted URLs and lists their tracking query keys while preserving the original link. It is intended for users who want to inspect URL privacy signals without sending the URL through a data-collecting service.

Open SourceWebEmbeddablemacOSWindowsLinux

Visit mozilla.org

Overview

5 features

In the Browser DevTools & extensions space, Tracker Flag takes a focused approach. It focuses on identifying tracking query parameters in URLs without modifying the original link. Tracker Flag is an open-source project aimed at privacy-conscious Firefox users. Tracker Flag is open source under the Open Source license. It runs on the web, embeddable surfaces, macOS, Windows, and Linux.

Behind Tracker Flag is John G. Jones, and it first shipped in 2026. Key capabilities include URL inspection, tracking key listing, and Original URL preservation. The interface is available in 32 languages, including Czech, German, and Greek.

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

URL inspection
Tracking key listing
Original URL preservation
No data collection
Firefox integration

Built with & integrations

Runs on

BrowserEmbeddablemacOSWindowsLinux

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed1 Sept · 21:12 UTC
Tracker Flag verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Tracker Flag

What is Tracker Flag?: Tracker Flag focuses on identifying tracking query parameters in URLs without modifying the original link. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Tracker Flag for?: Tracker Flag is an open-source project built for privacy-conscious Firefox users.
Does Tracker Flag have a free plan?: Yes — Tracker Flag is open source under the Open Source license and free to use.
What platforms does Tracker Flag run on?: Tracker Flag runs on the web, embeddable surfaces, macOS, Windows, and Linux.
Is Tracker Flag still maintained?: Unverified. Tracker Flag 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 develops Tracker Flag?: Tracker Flag is developed by John G. Jones.
When did Tracker Flag launch?: Tracker Flag first shipped in 2026.
Is Tracker Flag open source?: Yes — Tracker Flag is open source under the Open Source license.

At a glance

Pricing: Open Source
Platforms: Web
License: Open Source
First seen: 1 Sept 2026
Built for: privacy-conscious Firefox users
Model: Open source
Solves: Identifying tracking query parameters in URLs without modifying the original link.

Registered as

Firefox Add-ons: atracker-flag

Developer

John G. Jones

Index record

Indexed: 1 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 1 Sept 2026

Identity audit (13)

Slug: tracker-flag-mozilla-org
Lifecycle last checked: 8 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 1 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
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: 1 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/atracker-flag

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