Examine source code of Override when start

{
  "manifest_version": 2,
  "name": "Override when start",
  "version": "0.2",
  "description": "help you use new tab override Extensions like ( nightTab ) to start when the browser start",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "favicon.png",
    "128": "favicon.png",
    "256": "favicon.png"
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5633eb47-4e02-42b9-98bf-23fc65789b25}"
    }
  }
}