The story of the third-party cookie has taken more twists and turns than anyone expected. After years of promising to phase them out, Google reversed course in July 2024 and confirmed in April 2025 that third-party cookies will remain in Chrome with no new user-facing prompts. But make no mistake: the era of relying on third-party cookies is still drawing to a close. For digital marketers and web developers, this isn't just another industry shift, it's a fundamental change in how we think about user tracking, analytics, and personalisation. Let's walk through what this means for your business and how to prepare.
What's Actually Happening?
Google Chrome, the browser used by roughly 65-73% of internet users (depending on how you measure), was originally set to phase out support for third-party cookies entirely. While Safari blocked them via Intelligent Tracking Prevention back in 2017 and Firefox enabled Enhanced Tracking Protection by default in 2019, Chrome's planned move would have marked the true end of an era.
However, Google has now abandoned that plan. Third-party cookies remain active in Chrome, and users can manage their preferences through the browser's existing Privacy and Security settings. Despite this, the trend is unmistakable: users are increasingly blocking, deleting, or rejecting cookies on their own. Research from 2025 shows that 63.7% of users choose to block trackers because of privacy concerns. Third-party cookies are becoming steadily less effective even without a forced phase-out.
The reason? Privacy. Users are increasingly concerned about being followed around the internet, and regulations like GDPR and CCPA have made it clear that the old way of doing things isn't sustainable. Third-party cookies were invasive, often collected without proper consent, and frankly, their time is running out regardless of what Google decides.
Why Should Your Business Care?
Even though Chrome isn't forcibly removing third-party cookies, their effectiveness is declining rapidly. If your website relies on third-party cookies for any of the following, it's time to rethink your strategy:
Advertising and Retargeting - Those ads that follow users around after they visit your site depend on third-party cookies. With more users blocking them and Safari and Firefox already rejecting them, retargeting campaigns reach fewer people every year.
Analytics and Attribution - Understanding which marketing channels drive conversions becomes more complex as cookie coverage shrinks. You'll need new tools and approaches to measure ROI accurately.
Personalisation - Customising content based on user behaviour across multiple sites won't work the same way. Personalisation will need to happen using first-party data instead.
A/B Testing Tools - Many testing platforms rely on third-party cookies to track user behaviour and segment audiences. These will need updating or replacing.
The Silver Lining: Better Privacy, Better Trust
Here's the thing: this change is actually good for everyone. Users get more control over their data and privacy. Businesses that adapt well will build stronger, more trusting relationships with their customers. And let's be honest, the advertising industry has needed a shake-up for years.
Plus, this shift forces us to focus on first-party data, information users willingly share directly with you. This data is more accurate, more reliable, and more valuable than anything scraped from third-party cookies ever was.
What Replaces Third-Party Cookies?
The industry isn't sitting idle. Several alternatives are emerging, though the landscape has shifted significantly since Google retired its Privacy Sandbox APIs in October 2025:
First-Party Cookies - These cookies are set by your own website and remain unaffected. They're essential for basic functionality like keeping users logged in and remembering preferences. Focus on making the most of these.
Contextual Advertising - Instead of tracking users, ads are shown based on the content of the page they're viewing. It's old-school, but it works, and it doesn't need any personal data. Companies like GumGum and Seedtag are leading the way in this space.
Server-Side Tracking - By processing data on your own servers rather than in the browser, you maintain more control and privacy. Tools like Google Tag Manager Server-Side and analytics platforms are adapting to this model.
Universal IDs and Data Clean Rooms - Some companies are developing identity solutions that work with user consent, like hashed email addresses. Data clean rooms allow advertisers to match their data with publishers without sharing raw information. Solutions like LiveRamp and InfoSum are gaining traction.
CHIPS (Cookies Having Independent Partitioned State) - One of the few surviving elements from Google's Privacy Sandbox, CHIPS lets websites store cookies separately for each site a user visits, preventing cross-site tracking whilst still allowing third-party services to function.
A Note on Google's Privacy Sandbox - Google's original plan included the Topics API and Protected Audience API as cookie replacements. However, Google officially retired most Privacy Sandbox APIs in October 2025 due to low industry adoption. The surviving components are limited to CHIPS, FedCM (for identity flows), and Private State Tokens. If you had been building around the full Privacy Sandbox, it's time to pivot to the alternatives listed above.
How Accent Can Help You Prepare
At Accent, we've been preparing for this shift for years. Here's what we're doing for our clients:
Audit Your Current Setup - We review all third-party cookies on your site, assess their purpose, and identify which ones need replacing. No surprises, just a clear action plan.
Implement First-Party Data Strategies - We help you collect valuable first-party data through better user experiences, progressive profiling, and consent management. This means building sign-up forms, loyalty programmes, and gated content that users actually want to engage with.
Upgrade Your Analytics - We migrate clients to privacy-first analytics solutions that don't rely on third-party cookies. Google Analytics 4 is one option, but we also work with alternatives like Matomo and Plausible for those who want complete control.
Rebuild Tracking Infrastructure - Server-side tracking implementation is complex, but it's where the industry is heading. We've got the technical expertise to set this up properly, ensuring you don't lose crucial data in the transition.
Ensure Cookie Compliance - GDPR and CCPA aren't going anywhere. We implement proper consent management platforms (CMPs) that give users real control while keeping your site compliant.
Optimise for Performance - Fewer third-party scripts means faster websites. We use this transition as an opportunity to audit and remove unnecessary tracking code, improving your Core Web Vitals scores and user experience.
Practical Steps to Take Now
Don't wait until the last minute. Here's what you should do today:
- Conduct a cookie audit - Use tools like Cookiebot, CookieYes, or your browser's developer tools to see exactly what cookies your site is using and where they come from.
- Talk to your marketing team - Make sure everyone understands what's changing and how it affects their campaigns. This isn't just a technical issue, it's a business-wide shift.
- Invest in first-party data collection - Build better relationships with your users by offering value in exchange for their information. Think gated content, exclusive offers, and personalised experiences.
- Test new advertising strategies - Don't put all your eggs in one basket. Experiment with contextual advertising, first-party audiences, and server-side solutions before you need them.
- Upgrade your tech stack - Work with a development partner (like us!) to implement server-side tracking, update your CMS, and ensure your analytics tools are future-proof.
- Get consent right - Implement a robust consent management platform that clearly explains what data you're collecting and why. Make it easy for users to opt in, and just as easy to opt out.
The Bottom Line
The story of third-party cookies isn't ending with a bang; it's a gradual fade. Google may have kept them alive in Chrome for now, but between Safari and Firefox already blocking them, users increasingly rejecting them, and regulators tightening the rules, their usefulness is diminishing year on year. Yes, adapting requires investment, but businesses that embrace this change will come out stronger. You'll have better data, more trust from your users, and a future-proof digital strategy.
References
- Google's reversal on third-party cookie deprecation (July 2024) - Google announced it would not phase out third-party cookies, instead letting users manage preferences through Chrome settings. Digital Commerce 360 - Google ends its third-party cookies deprecation plans for Chrome
- Google confirms no user choice prompt for cookies (April 2025) - Google confirmed it will not introduce a separate consent prompt for third-party cookies in Chrome. OneTrust - Google Drops Plans for Third-Party Cookie Choice Prompt in Chrome
- Google retires Privacy Sandbox APIs (October 2025) - Google officially retired Topics API, Protected Audience API, Attribution Reporting, and other Privacy Sandbox technologies due to low adoption. AdExchanger - Google Pulls The Plug On Topics, PAAPI And Other Major Privacy Sandbox APIs
- Privacy Sandbox retirement confirmation - Independent reporting confirmed the shutdown of the Privacy Sandbox initiative. Usercentrics - Google Privacy Sandbox officially shuts down
- Chrome global browser market share - Chrome holds between 65% and 73% of the global browser market depending on the source and measurement methodology. StatCounter - Browser Market Share Worldwide | DemandSage - How Many People Use Google Chrome | About Chromebooks - Google Chrome Statistics
- User tracker-blocking behaviour - Research indicates 63.7% of users choose to block trackers due to privacy concerns. ElectroIQ - Desktop Browser Statistics 2026
- Safari Intelligent Tracking Prevention (2017) - Apple introduced ITP in Safari 11 to limit cross-site tracking. WebKit Blog - Intelligent Tracking Prevention
- Firefox Enhanced Tracking Protection (2019) - Mozilla enabled ETP by default for all Firefox users. Mozilla Blog - Firefox Now Available with Enhanced Tracking Protection by Default
- First-party data adoption trends - In Q1 2025, 71% of publishers recognised first-party data as a key source of positive advertising results, up from 64% in 2024. Adtelligent - How Third-Party Cookies Deprecation Affects Programmatic Ecosystem
- CHIPS (Cookies Having Independent Partitioned State) - One of the surviving Privacy Sandbox technologies, allowing partitioned cookie storage. Google Developers - CHIPS Documentation
- Privacy Sandbox timeline and CMA involvement - Comprehensive timeline of Google's Privacy Sandbox journey, regulatory scrutiny, and industry responses. ZGP Blog - Google Privacy Sandbox Timeline
- Google's official Privacy Sandbox update - Google's announcement on the future of Privacy Sandbox technologies. Privacy Sandbox - Update on Plans for Privacy Sandbox Technologies
- GDPR (General Data Protection Regulation) - The EU's comprehensive data protection law. GDPR.eu
- CCPA (California Consumer Privacy Act) - California's consumer data privacy legislation. California Attorney General - CCPA
- Cookie audit tools - Free tools for auditing website cookies. Cookiebot Cookie Checker | CookieYes Cookie Checker | CookieMetrix