Examine source code of Netatmo CO₂ Indicator

{
  "manifest_version": 2,
  "name": "Netatmo CO₂ Indicator",
  "short_name": "CO₂ Indicator",
  "version": "1.6.15",
  "description": "See your CO₂ level in the browser toolbar",
  "permissions": [
    "identity",
    "storage",
    "alarms",
    "theme"
  ],
  "optional_permissions": [
    "notifications"
  ],
  "icons": {
    "64": "icon.svg"
  },
  "browser_action": {
    "default_title": "Netatmo CO₂ Measurement",
    "default_icon": "status/gray.svg"
  },
  "background": {
    "scripts": [
      "config.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4b69f471-a76c-4355-be23-8d9b0c9802db}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ]
      }
    }
  }
}