The Platform for Privacy Preferences Project (P3P) is an obsolete protocol allowing websites to declare their intended use of information they collect about web browser users. Designed to give users more control of their personal information when browsing, P3P was developed by the World Wide Web Consortium (W3C) and officially recommended on April 16, 2002. Development ceased shortly thereafter and there have been very few implementations of P3P. Internet Explorer and Microsoft Edge Legacy were the only major browsers to support P3P. Microsoft has ended support from Windows 10 onwards. Internet Explorer and Edge [Legacy] on Windows 10 no longer support P3P as of 2016.[3] W3C officially obsoleted P3P on 2018-08-30.[4] The president of TRUSTe has stated that P3P has not been implemented widely due to the difficulty and lack of value.[5]
Which browsers are best for privacy?
An open-source privacy audit of popular web browsers.
This ‘Privacy Browser’ Has Dangerous Hidden Features
The Universe Browser is believed to have been downloaded millions of times. But researchers say it behaves like malware and has links to Asia’s booming cybercrime and illegal gambling networks.
12 November 2025 | Isolated Web Apps - Current state and future direction | Calendar
The World Wide Web Consortium (W3C) is an international community where Member organizations, a full-time staff, and the public work together to develop Web standards.
The Browser Choice Alliance
The Browser Choice Alliance is a coalition of browsers dedicated to the principle that consumers should have the right to use their browser of choice on Windows devices.
Chris Granger - "Is Web3... anything?"
The term “web3” seems pretty fluid and is being used as a label for a bunch of disparate ideas. Given that it’s a decentralized group describing a decentralized movement, that lack of focus isn’t exactly surprising. Almost by definition it’s going to end up being different things to different people.
About Browser Choice Allliance
The issue Microsoft’s deceptive tacticsimpede consumer choiceFor years, Microsoft has manipulated desktop browser choice, using deceptive tactics to push Edge onto users. Instead of competing on quality, it relies on forced resets, misleading prompts, and hidden settings to trap people into using its browser. Every time Microsoft forces, pushes or…
Browsers & Standards Work 2026: Call for Community Input
TL;DR: IPFS is planning the next phase of work to make browsers better for the decentralized web – not just IPFS, but any protocol that needs lightweight crypto, peer-to-peer connections, or native browser integration. We need your input on what features matters most. Background: What We’ve Accomplished Over the past 5 years, sustained collaboration with Igalia has delivered real improvements to all major browsers: Ed25519 in WebCrypto API - Shipped in Chrome 137 (May 2025), now available in...
Web Platform Design Principles
Copyright © 2026 World Wide Web Consortium. W3C® liability, trademark and permissive document license rules apply.
Web of the People — Open Indie
Whether you think of web3 as the advent of peer-to-peer protocols, coin-operated blockchains or autocomplete-AI synthesizers, change is c...
Privacy vs. Profit: The Impact of Google's Manifest Version 3 (MV3) Update on Ad Blocker Effectiveness
Google's recent update to the manifest file for Chrome browser extensions, transitioning from manifest version 2 (MV2) to manifest version 3 (MV3), has raised concerns among users and ad blocker providers, who worry that the new restrictions, notably the shift from the powerful WebRequest API to the more restrictive DeclarativeNetRequest API, might reduce ad blocker effectiveness. Because ad blockers play a vital role for millions of users seeking a more private and ad-free browsing experience, this study empirically investigates how the MV3 update affects their ability to block ads and trackers. Through a browser-based experiment conducted across multiple samples of ad-supported websites, we compare the MV3 to MV2 instances of four widely used ad blockers. Our results reveal no statistically significant reduction in ad-blocking or anti-tracking effectiveness for MV3 ad blockers compared to their MV2 counterparts, and in some cases, MV3 instances even exhibit slight improvements in blocking trackers. These findings are reassuring for users, indicating that the MV3 instances of popular ad blockers continue to provide effective protection against intrusive ads and privacy-infringing trackers. While some uncertainties remain, ad blocker providers appear to have successfully navigated the MV3 update, finding solutions that maintain the core functionality of their extensions.
Vision for W3C
Copyright © 2025 World Wide Web Consortium. W3C® liability, trademark and permissive document license rules apply.
Margin - Microsoft Edge Add-ons
Make Microsoft Edge your own with extensions that help you personalize the browser and be more productive.
Fedica - Microsoft Edge Addons
Make Microsoft Edge your own with extensions that help you personalize the browser and be more productive.
