Mammoth blocks the ad networks, analytics, and fingerprinting scripts that follow you across the web — and shows you exactly who tried.
Free · runs on your device · read the privacy policy →
Open any page and Mammoth shows you the breakdown — no jargon, just who reached for your data and what got stopped. A real example from one news article:
Trackers are stopped before they load, using the browser's own blocking engine. Mammoth never reads the contents of the pages you visit.
Third-party tracking cookies get deleted. The first-party ones that keep you logged in stay exactly where they are.
A per-site, categorized count of everything blocked — so you can finally see what every page was doing behind your back.
Last updated: [FILL IN DATE] · Publisher: [FILL IN NAME] · Contact: [FILL IN EMAIL]
This is a starting-point template written for the extension as built. It is not legal advice. Before publishing commercially, fill in the bracketed fields and have it reviewed for your jurisdiction.
Mammoth blocks advertising, analytics, social, and fingerprinting requests, removes third-party (cross-site) cookies, and shows you a count of what it blocked on each site. All of this happens locally in your browser.
The extension stores the following using your browser's local extension storage (chrome.storage.local). This data never leaves your device:
The extension does not store your browsing history, the contents of pages you visit, the contents of network requests, form data, or any personally identifying information.
Blocking is performed by the browser's declarativeNetRequest engine using a fixed list of rules. This approach is designed so that the extension cannot read the contents of your network requests. The extension supplies rules; the browser does the blocking.
To attribute blocked items to the correct page and show the right badge count, the extension reads the address (host) of your active tab. This is used only in the moment, in memory, to label the report. It is not logged, stored long-term, or transmitted.
The cookie feature reads cookies only to identify and delete third-party tracking cookies. Cookie contents are never recorded or sent anywhere.
We do not sell your data. We do not share it with third parties. We do not use it for advertising, profiling, or creditworthiness. There is nothing to share — no data leaves your device.
If this policy changes, the "Last updated" date above will change, and the new version will ship with the extension.
Questions: [FILL IN EMAIL].
Mammoth