Environment integrity checks break that model.

If websites can verify what browser you're using, what OS you're running, and what extensions you have installed, they can block access based on those factors. They can require that you use Chrome. They can block Linux users. They can prevent you from running ad blockers or privacy tools.

That's not hypothetical. We've already seen this pattern with DRM for video content. Services like Netflix and Disney+ require specific browsers and operating systems to play content at full quality. Users running Linux or alternative browsers get degraded experiences or no access at all.

The Fraud Prevention Excuse

Google will argue that Fraud Defence is about protecting businesses from bots, credential stuffing, and other attacks. And that's a legitimate concern — online fraud is a real problem that costs businesses billions.

But you don't need environment integrity checks to fight fraud. The industry has developed sophisticated bot detection systems that analyze behavior patterns, traffic sources, and interaction timing. These systems work without requiring browsers to attest to their "integrity" or reveal what extensions users have installed.

Environment integrity is a nuclear solution to a problem that can be solved with conventional weapons. The collateral damage to user privacy and browser diversity isn't justified by the fraud prevention benefits.

The Enterprise Trojan Horse

By positioning this as an enterprise product rather than a general web standard, Google is trying to bypass the developer backlash that killed WEI.

If Fraud Defence gets adoption among major enterprise websites — banking sites, e-commerce platforms, corporate intranets — it could normalize environment integrity checks. Once the technology is deployed and normalized in the enterprise context, expanding it to the broader web becomes easier.

This is a strategy we've seen before. Introduce controversial technology in a limited context where the opposition is less organized. Build adoption and normalize the capabilities. Then expand the scope once the precedent is established.

What Needs to Happen

The developer community needs to push back on Fraud Defence the same way it pushed back on WEI. Enterprise customers considering the product need to understand the broader implications for the open web.

Browser makers other than Google — Mozilla, Apple, and others — need to clearly state their opposition to environment integrity checks and refuse to implement the supporting technology.

And regulators need to examine whether Google is using its dominant position in cloud services and advertising to push technologies that entrench its control over web access.

The Technology Exists. The Question Is Whether We Accept It.

Environment integrity checks are technically feasible. Google has the engineering capability to build and deploy them. That's not in question.

What's in question is whether the web community will accept a technology that fundamentally changes how we access online content — giving website operators unprecedented control over what software users can run.

We rejected WEI last year. We need to reject Fraud Defence for the same reasons, even if it comes with prettier marketing and enterprise branding.

The open web is worth fighting for.