Examine source code of Tab Renamer

{
  "manifest_version": 2,
  "name": "Tab Renamer",
  "description": "Adds functionality to rename a tab",
  "version": "1.0",
  "icons": {
    "48": "icons/image-48.png"
  },
  "permissions": [
    "menus",
    "tabs",
    "https://*/*",
    "http://*/*"
  ],
  "background": {
    "scripts": [
      "script.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9f3f19ee-1ce8-4e7e-9eb4-b886e3de06c6}"
    }
  }
}