Examine source code of Smart Tab Sorter

{
  "manifest_version": 2,
  "name": "Smart Tab Sorter",
  "version": "1.0.0",
  "description": "Sort browser tabs automatically with customisable rules",
  "author": "Tom",
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{41f74d88-6b56-4840-b439-91fd350b1ac5}"
    }
  }
}