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Browser Operator is Zeus’s browser automation extension, enabling AI Agents to control the user’s browser to perform automated tasks.

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Overview

Browser Operator is implemented as a Chrome extension, allowing AI to:
  • Navigate to web pages
  • Click elements
  • Fill out forms
  • Extract content
  • Take screenshots
  • Execute JavaScript

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Installation

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From Chrome Web Store

  1. Visit the Chrome Web Store
  2. Search for “Zeus Browser Operator”
  3. Click “Add to Chrome”
  4. Confirm installation

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Developer Mode Installation

  1. Download the extension source code
  2. Open chrome://extensions
  3. Enable “Developer mode”
  4. Click “Load unpacked”
  5. Select the extension directory

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Architecture

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Connection Flow

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1. Install Extension

After installation, the extension displays a Zeus icon in the toolbar.

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2. Login and Authorization

  1. Click the extension icon
  2. Log in to your Zeus account (or scan QR code to log in)
  3. Authorize extension access

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3. Establish Connection

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Supported Actions

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Element Interaction

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Page Actions

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Advanced Actions

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Element References (ref)

Browser Operator uses element references (refs) to identify page elements.

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Getting a ref

Use browser_snapshot to get the page structure, which returns an element list with refs. Each element includes a ref (unique identifier), tag (HTML tag), text (element text), and more.

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Using a ref

After obtaining a ref, you can use it in subsequent actions (such as browser_click, browser_fill) to precisely locate the target element.

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Security Mechanisms

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Permission Control

  • Per-action approval - Each action can be configured to require user confirmation
  • Domain restrictions - Restrict actions to specific domains only
  • Action logging - All actions are logged

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Sandbox Environment

  • The extension runs in a sandbox environment
  • Cannot access sensitive browser data (such as passwords or cookies)
  • Cannot access data from other extensions

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Authentication Security

  • Uses JWT Token authentication
  • Tokens are refreshed periodically
  • Supports device revocation

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Use Cases

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Automated Form Filling

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Web Data Extraction

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Automated Testing

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Troubleshooting

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Extension Shows “Not Connected”

  1. Check if you’re logged in
  2. Refresh the extension (click refresh on chrome://extensions)
  3. Check if the WebSocket server is running
  4. Check browser console for errors

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Action Execution Failed

  1. Ensure the page has fully loaded
  2. Check if the element ref is valid
  3. Try using browser_snapshot to refresh the element list
  4. Check if a popup is blocking the action

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Blank Screenshot

  1. Wait for page rendering to complete
  2. Check for iframe content
  3. Try using fullPage: false parameter

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MCP Server

Browser Operator also runs as an MCP server and can be invoked by other MCP clients. All browser action tools (such as browser_navigate, browser_click, etc.) are exposed through the standard MCP protocol.

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Integration with Lingda Platform

Browser Operator can be integrated with third-party platforms (such as Lingda):

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Authentication Flow

  1. Third-party backend calls Zeus API to obtain a JWT
  2. JWT is passed to the Browser Operator extension
  3. Extension uses JWT to connect to WebSocket

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Tool Invocation Flow