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Is Copilot sidebar for Chrome safe?

This security report analyses whether Copilot sidebar for Chrome is safe to install on your browser. We check Copilot sidebar for Chrome for malicious behaviour, data exfiltration, suspicious permissions, and known vulnerabilities so you can decide if Copilot sidebar for Chrome is safe for your personal or enterprise fleet.

Medium risk

Extension spoofs Edge browser user-agent and strips security headers (CSP, X-Frame-Options) to embed Microsoft Copilot in Chrome. Has postMessage without origin validation allowing arbitrary iframes to trigger page data extraction.

45Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Updated 10 April 2026ncjedehfkpnliaafimjhdjjeggmfmlgf

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