Examine source code of Nucleus - Sales Task Manager

{
  "manifest_version": 2,
  "name": "Nucleus - Sales Task Manager",
  "version": "1.2.2",
  "description": "Multi-channel outbound tool for managing sales tasks, email sequences, calls, and LinkedIn outreach",
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "https://www.linkedin.com/*",
    "https://mail.google.com/*",
    "https://api.anthropic.com/*",
    "https://api.airtable.com/*",
    "https://api.notion.com/*",
    "https://*.supabase.co/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.linkedin.com/*"
      ],
      "js": [
        "content-linkedin.js"
      ],
      "css": [
        "content.css"
      ]
    },
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "gmail-inject.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "nucleus@salestaskmanager.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "sidebar_action": {
    "default_title": "Nucleus",
    "default_panel": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      },
      "description": "Toggle Nucleus sidebar"
    }
  },
  "web_accessible_resources": [
    "icons/*.png",
    "popup.html"
  ],
  "browser_action": {
    "default_title": "Toggle Nucleus",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  }
}