GitHub Copilot Browser

Your AI copilot for the web — a Chrome/Edge browser extension that brings GitHub Copilot directly into your browser.

Features

• Side Panel Chat: Persistent chat interface accessible via toolbar icon or Ctrl+Shift+Y / ⌘+Shift+Y
• Page Understanding: Extract content, structure, forms, tables, and links from any web page
• Browser Automation: Click, type, fill forms, navigate, and interact with web pages
• Screenshots: Capture visible viewport or specific elements
• Visual Feedback: Highlight elements on the page during agent interactions
• Session History: Persistent chat sessions stored locally
• Dark/Light Mode: Follows your system theme preference

Getting Started

Prerequisites

• Node.js 18+
• Chrome or Edge browser
• GitHub Copilot CLI (@github/copilot)

Setup

1. Install dependencies:

   npm install

2. Build the extension:

   npm run build

3. Load the extension:

   • Go to chrome://extensions (or edge://extensions)
   • Enable "Developer mode"
   • Click "Load unpacked"
   • Select the dist/ directory

4. Register the native messaging host:

   # macOS/Linux
   scripts/register-host.sh <your-extension-id>
   
   # Windows
   scripts\register-host.bat <your-extension-id>

   Your extension ID is shown on the extensions page after loading.

5. Restart your browser and click the Copilot icon in the toolbar.

Development

npm run dev    # Start Vite dev server with HMR
npm run build  # Production build

Architecture

Side Panel (React) ←→ Background Service Worker ←→ Native Messaging Host (Node.js) ←→ Copilot CLI
                      ↕
                   Content Scripts (DOM access)

Tools

The agent has access to 27+ tools across categories:

• Page Content: get_page_content, get_page_html, get_page_structure, query_selector, get_page_tables, get_page_links, get_page_forms
• Visual: capture_screenshot, highlight_element
• Interaction: click_element, type_text, fill_form, select_option, scroll_page, press_key
• Navigation: navigate_to, go_back, go_forward, open_tab, close_tab, switch_tab, reload_page
• Utility: wait_for_element, execute_javascript

License

MIT