membrAIn Shadow AI Browser Extension

// detects ungoverned AI tool usage · Chrome MV3 · no prompt content stored

What it does

Detects when employees use ungoverned AI tools (ChatGPT, Claude.ai, Gemini, Bing Chat, Perplexity, Poe, Character.ai, HuggingChat) on managed devices, and reports anonymized usage events to your membrAIn portal.

REPORTS:
  • AI tool name + vendor
  • Visit timestamp
  • Prompt submission events
  • Prompt size (chars only)
  • Browser user-agent
DOES NOT REPORT:
  • Prompt text content
  • Response content
  • Any non-AI tab activity
  • Personal data outside AI tools

Install (sideload for testing)

1
Install from the Chrome Web Store (Chrome & Edge). For managed/RMM rollout, generate a pre-filled GPO/Intune/Jamf script from the portal (Deploy Web Agent).
2
Open Chrome: chrome://extensions/
3
Toggle "Developer mode" in the top right corner.
4
Click "Load unpacked" and select the unzipped membrain-extension folder.
5
Click the extension icon in your toolbar, enter your Account ID (find it in Settings → Account), and click "Enroll device".
Your Account ID: Available in the portal under Settings → Account, or in your enrollment email. Format: acct_*

Production deployment (Google Workspace MDM)

For fleet deployment to all corporate Chrome browsers, package the extension and push via Google Admin Console:

1. Package the extension folder as a .crx (signed)
2. Upload to Google Admin Console → Devices → Chrome → Apps & Extensions
3. Force-install for organization users
4. Configure managed storage policy with your Account ID
Privacy note: The extension never reads, transmits, or stores prompt content. It only reports that a user visited an AI tool and submitted a prompt of N characters. Review content.js and background.js in the bundle to verify.

How events flow

Browser tab (chatgpt.com)
  ↓ content.js detects prompt submit
  ↓ background.js packages event
  ↓ POST gateway.getmembrain.ai/portal/{acctId}/shadow-event
  ↓ gateway writes to audit_events (provider='shadow_ai')
  ↓ appears in portal: AI Sources → Shadow AI Discovery

Questions? [email protected]