Examine source code of Randomize tabs order!

{
  "manifest_version": 2,
  "name": "Randomize tabs order!",
  "version": "1.0.0rc1",
  "description": "Randomize the order of your tabs.",
  "icons": {
    "48": "icon.svg"
  },
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_title": "Randomize tabs order!",
    "default_icon": "icon.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}