A browser extension that audits all other installed Chrome extensions for permission changes, ownership transfers, and silent code updates that match known supply-chain attack patterns
287 Chrome extensions with 37 million combined installs were caught silently exfiltrating browsing history to data brokers, and a December 2024 supply-chain campaign phished developers to compromise 36 trusted extensions in a single wave. The attack surface is invisible to users: legitimate extensions get acquired or updated post-install and start exfiltrating without triggering any browser warning. This tool sits inside Chrome and continuously watches every installed extension for the three attack vectors that recur across every documented incident: new permissions added in an update, a developer-account ownership transfer to a new entity, and code pattern changes that match known exfiltration signatures from the 287-extension dataset.
Demand Breakdown
Social Proof 1 sources
Gap Assessment
4 tools exist (Extension.Ninja, Spin.AI SpinCRX, ExtensionShield, Extension Update Monitor) but gaps remain: No ambient real-time monitoring of extensions already installed in a user's browser; requires manual submission of each extension; no ownership-transfer detection; Enterprise-only pricing locks out individual users and small teams; no lightweight consumer-facing alert for silent ownership transfers or acquisition-triggered code changes.
Features2 agent-ready prompts
Competitive LandscapeFREE
| Product | Does | Missing |
|---|---|---|
| Extension.Ninja | Per-extension paid static and runtime scans with update monitoring at $50 per extension per month or $10 per one-time static scan | No ambient real-time monitoring of extensions already installed in a user's browser; requires manual submission of each extension; no ownership-transfer detection |
| Spin.AI SpinCRX | Enterprise IT platform covering 400k+ extensions with risk assessment, policy enforcement, and continuous monitoring across all browsers and user profiles | Enterprise-only pricing locks out individual users and small teams; no lightweight consumer-facing alert for silent ownership transfers or acquisition-triggered code changes |
| ExtensionShield | Pre-install scanner that scores any Chrome Web Store extension URL for permission risks and malware signals before the user installs it | Entirely pre-install; does nothing once an extension is installed and silently updated post-acquisition |
| Extension Update Monitor | Logs and alerts when installed extensions receive updates, free Chrome Web Store extension | No behavioral analysis of what changed in the update; no permission diff; no ownership or developer-account change detection; no malicious pattern matching |
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