Examine source code of Tab Control Center

{
  "manifest_version": 2,
  "default_locale": "en",
  "name": "__MSG_extension_name__",
  "description": "__MSG_extension_description__",
  "version": "1.0.0",
  "homepage_url": "https://robinlieb.com",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png",
    "256": "icons/icon-256.png",
    "512": "icons/icon-512.png"
  },
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/toolbar-icon-16.png",
      "24": "icons/toolbar-icon-24.png",
      "32": "icons/toolbar-icon-32.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a2a2be6e-46db-4824-8f72-9e0414c449dc}"
    }
  }
}