LinkedIn Is Scanning Every Chrome Extension You Have—Including Your Privacy Tools

What LinkedIn Is Doing Behind Your Back

Every time you visit LinkedIn, a hidden JavaScript file runs in your browser. It probes for installed Chrome extensions by attempting to access internal file resources tied to specific extension IDs. If the resource loads, the extension is installed. If it fails, it is not. There is no permission prompt, no notification, and no way for most users to know it is happening.

The scale of the scanning has grown rapidly. In 2025, LinkedIn checked for roughly 2,000 extensions. Two months later it was 3,000. The list now covers 6,236 browser extensions and continues to expand, according to a BleepingComputer investigation that independently confirmed the findings.

It Is Not Just Extensions

Beyond cataloguing your extensions, the same script collects detailed device fingerprinting data:

• CPU core count and available memory
• Screen resolution
• Timezone and language settings
• Battery status
• Audio configuration
• Storage features

Combined, these signals form a device fingerprint that can identify and track you across sessions, even if you clear your cookies. And because the scan ties directly to your LinkedIn profile, the fingerprint is linked to your real name, employer, job title, and professional network.

What LinkedIn Is Looking For

More than 200 of the extensions on LinkedIn's scan list are competing sales and prospecting tools, including Apollo, Lusha, and ZoomInfo, which scrape LinkedIn profile data. The company appears to be hunting for tools that violate its terms of service.

But the scanning is indiscriminate. LinkedIn also checks for language tools, grammar checkers, tax professional software, privacy extensions, and ad blockers. If you have it installed, LinkedIn wants to know about it.

LinkedIn's Defense Does Not Hold Up

LinkedIn told BleepingComputer that the extension detection "protects the privacy of our members, their data, and to ensure site stability." The company denied using the data "to infer sensitive information about members."

That framing deserves scrutiny. LinkedIn scans your browser without consent, builds a hardware fingerprint of your device, catalogs your extensions, and calls it privacy protection. The BrowserGate report, authored by Fairlinked e.V., first documented these practices. LinkedIn responded by claiming the report originated from a developer whose account was restricted for scraping, though a German court had already ruled on related claims.

Your Extensions Reveal More Than You Think

Your installed extensions paint an intimate portrait of your digital life. They reveal whether you use password managers, VPNs, accessibility tools, mental health apps, or political content blockers. A privacy advocate's browser looks very different from a marketer's browser, and LinkedIn can now tell the difference.

LinkedIn is not the first platform to fingerprint visitors this aggressively. In 2021, eBay was caught performing automated port scans on visitor devices. Citibank, TD Bank, and other financial institutions used similar techniques. But LinkedIn's approach stands out for its scale: 6,236 extensions and growing, each tied to a real identity.

Email Tracking Adds Another Layer

LinkedIn is also one of the most aggressive email trackers in your inbox. Its marketing emails contain tracking pixels that report when, where, and on what device you open them. Between inbox surveillance and browser fingerprinting, the platform is building a remarkably complete profile of your professional and digital life.

How to Protect Yourself

There is no setting in LinkedIn to disable extension scanning. The detection runs through JavaScript, so the most effective defenses are:

1. Use a separate browser profile for LinkedIn with minimal extensions installed
2. Use Firefox instead of Chrome. Firefox's extension architecture makes this type of scanning significantly harder
3. Use LinkedIn's mobile app instead of the web version, which avoids browser extension scanning entirely
4. Block tracking pixels in email using a tool like Gblock to cut off LinkedIn's email surveillance

The Bigger Picture

Google reversed its stance on fingerprinting in late 2024, now allowing advertisers to use the technique as cookies phase out. Apple and Mozilla have taken stronger positions against fingerprinting, but enforcement remains inconsistent. Safari 26 recently introduced noise injection into fingerprinting scripts, a promising step.

For anyone running privacy extensions, ad blockers, or security tools, the irony is clear: the tools meant to protect your privacy may themselves reveal what you are trying to hide. And companies like LinkedIn are watching.