Claude for Chrome seems to be walking right into the "lethal trifecta." https://simonwillison.net/2025/Jun/16/the-lethal-trifecta/
"The lethal trifecta of capabilities is:"
• Access to your private data—one of the most common purposes of tools in the first place!
• Exposure to untrusted content—any mechanism by which text (or images) controlled by a malicious attacker could become available to your LLM
• The ability to externally communicate in a way that could be used to steal your data (I often call this “exfiltration” but I’m not confident that term is widely understood.)
If your agent combines these three features, an attacker can easily trick it into accessing your private data and sending it to that attacker.
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