Examine source code of Bot icon

{
  "manifest_version": 2,
  "name": "Bot icon",
  "version": "1.0",
  "description": "The bot icon is compact, friendly, modern and cute. Round, slightly larger than the body, creating a sense of approachability. On the head are two small antennas.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Click me!"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{add8c703-f1e1-4cee-91f4-79f84a601d11}"
    }
  }
}