Examine source code of Inspire Me

{
  "manifest_version": 2,
  "name": "Inspire Me",
  "description": "Get inspired with quotes about hard work and passive income.",
  "version": "2.0",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png",
      "48": "icon.png",
      "128": "icon.png"
    }
  },
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0c1d62a9-5319-4c06-8b5d-3196b4ab3e47}"
    }
  }
}