Anthropic's Claude Desktop silently installs a browser bridge across every Chromium browser on your machine when you install it. No consent screen. No opt-in. No notification. Chrome, Brave, Edge, Arc, Vivaldi, Opera, and browsers you haven't even installed yet.
A privacy researcher discovered the app quietly writes configuration files into every Chromium-based browser, pre-authorising a bridge that can access any site you're logged into, read page content, fill forms and record sessions. The files are rewritten on every launch, so deleting them manually doesn't stick.
The only way to remove them is to uninstall the app entirely.
Anthropic says it's disclosed in the terms and conditions. Most people don't read the terms and conditions. That's the problem.
Claude Desktop browser hooks | Anthropic privacy issue | AI desktop app security | browser security 2026 | cybersecurity news | data privacy | shadow AI risk
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