Examine source code of Herald

{
  "manifest_version": 2,
  "name": "Herald",
  "author": "Herald",
  "version": "0.1.13",
  "description": "Herald helps product managers align their teams around customer needs.",
  "icons": {
    "128": "logo128.png"
  },
  "browser_action": {
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "externally_connectable": {
    "matches": [
      "*://localhost:*/*",
      "https://app.heraldhq.com/*",
      "https://heraldhq-app-staging.netlify.app/*"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "windows": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y",
        "chromeos": "Ctrl+Shift+Y",
        "linux": "Ctrl+Shift+Y"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hello@heraldhq.com"
    }
  },
  "content_security_policy": "script-src 'self' https://apis.google.com https://extension.heraldhq.com/; object-src 'self'",
  "permissions": [
    "storage",
    "activeTab",
    "identity"
  ]
}