Scanning your connection...
Default PrivacyDefault Privacy
Back to Glossary
Browsers

What is Google Privacy Sandbox?

Google's initiative to replace third-party cookies in Chrome with new tracking technologies (Topics API, Attribution Reporting, Protected Audiences) that Google claims protect privacy while preserving targeted advertising — critics call it a way for Google to consolidate tracking power.

Also known as: Privacy Sandbox, Google Topics API, Chrome Privacy Sandbox

Google's Privacy Sandbox is perhaps the most sophisticated example of privacy washing in tech history — marketing a consolidation of tracking power as a privacy improvement.

What It Is

Privacy Sandbox is a set of technologies designed to replace third-party cookies in Chrome:

Topics API

  • Chrome categorizes your browsing interests into topics (e.g., "Sports," "Travel," "Technology")
  • When you visit a website, Chrome shares your top topics with advertisers
  • Topics are based on your recent 3 weeks of browsing history
  • Google claims this is more private than cookies because individual sites aren't tracked

Attribution Reporting API

  • Allows advertisers to measure ad effectiveness without cookies
  • Reports conversions (purchases, signups) in aggregate rather than per-user
  • Still enables tracking of ad performance

Protected Audiences API (formerly FLEDGE)

  • Enables interest-based advertising using on-device auctions
  • Advertisers bid on showing ads to interest groups without seeing individual data
  • The browser itself runs the ad auction locally

Why Critics Call It a Power Grab

Google Becomes the Gatekeeper

With third-party cookies, any company can track users across the web. With Privacy Sandbox, only Google controls the tracking infrastructure — through Chrome, which has ~65% browser market share.

It's Still Tracking

  • Chrome still builds a profile of your interests based on browsing
  • Google still knows your topics, browsing patterns, and ad interactions
  • The "privacy" improvement is removing other companies' ability to track you — while preserving Google's

Antitrust Concerns

  • The UK's Competition and Markets Authority (CMA) investigated Privacy Sandbox
  • Concerns that it eliminates competition in digital advertising by deprecating the tools competitors rely on
  • Google agreed to oversight conditions but maintains control over the timeline

The Timeline Rollercoaster

  • 2020: Google announces plan to kill third-party cookies in Chrome by 2022
  • 2021-2023: Deadline repeatedly delayed due to regulatory and industry pushback
  • 2024: Google reversed course — announced it would keep third-party cookies but offer users a choice
  • 2025: Privacy Sandbox features continue rolling out alongside third-party cookies

What to Actually Do

If you want real browser privacy, don't wait for Google to protect you:

  1. Use Firefox, Brave, or LibreWolf instead of Chrome
  2. Install uBlock Origin to block trackers regardless of cookie status
  3. Enable Firefox's Enhanced Tracking Protection (set to Strict)
  4. Use a privacy-focused search engine — Brave Search, DuckDuckGo, or Kagi

Related Terms

Ad Tech Ecosystem

The network of companies, technologies, and data flows that power online advertising — the largest commercial surveillance infrastructure ever built, tracking billions of people across the web.

Browser Fingerprinting

A tracking technique that collects information about your browser, device, and settings to create a unique identifier. Unlike cookies, fingerprints are nearly impossible to delete and can track you across websites without your knowledge or consent.

Cookie

A small piece of data stored in your web browser by websites you visit. While cookies enable useful features like staying logged in, they're also used extensively for tracking your browsing activity across the web for advertising and analytics purposes.

Privacy Washing

The practice of companies marketing themselves as privacy-friendly while continuing to collect, share, or exploit user data — similar to 'greenwashing' in environmentalism, where the appearance of privacy is used as a marketing tool without meaningful protection.

Surveillance Capitalism

An economic system where personal data is systematically collected, analyzed, and sold to predict and influence human behavior for profit.

Third-Party Tracking

The practice of monitoring user behavior across multiple websites using embedded scripts, pixels, cookies, and fingerprinting techniques.

Have more questions?

Use our guided flow to get the right next privacy step for Google Privacy Sandbox.

Open Guided Flow