ExtGuard: A lightweight, zero-footprint browser extension that acts as a 'man-in-the-middle' for other extensions, inspecting all outbound API calls for PII/PCI data and blocking unauthorized domains without slowing down user workflow.
Validated on That's Missing platform | Status: Active Opportunity
Market Catalyst & News Trigger
"Zero-Day 'Browser Extension Supply Chain' Attack Compromises 40% of Top 500 Chrome Business Extensions"
The Workflow Friction
Mid-market companies (50-500 employees) using SaaS tools (Slack, Salesforce, Gmail) via browser extensions face silent data exfiltration. Current EDR (Endpoint Detection and Response) tools do not monitor browser extension network traffic at the DOM level, resulting in an average breach detection time of 21 days. IT teams lack visibility into third-party extension behavior.
Problem Summary
Real-world problem signal validation.
One-Shot MVP Builder Blueprint (48 Hours)
1. Core Engine: WASM module injected into browser context to intercept `fetch` and `XMLHttpRequest` calls from non-owned extensions. 2. Logic Layer: Pattern matching for sensitive data (CC numbers, SSNs, API keys) in request payloads. 3. Action: If sensitive data detected in non-whitelisted domain request, silently drop packet and log event. 4. Dashboard: SOC view showing 'Shadow Extension' activity, data leak attempts blocked, and compliance reports for GDPR/CCPA. 5. Onboarding: One-click SSO integration for enterprise IT to deploy via MDM.
Recommended Developer Tech Stack
- React
- WebAssembly
- Kafka
- Elasticsearch