Examine source code of Sort Tabs

{
  "manifest_version": 2,
  "name": "Sort Tabs",
  "version": "1.1resigned1",
  "description": "Sort tabs by title/domain",
  "browser_action": {
    "default_icon": {
      "32": "drawing.svg.png"
    },
    "default_title": "Sort",
    "default_popup": "popup.html"
  },
  "permissions": [
    "notifications",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cd89151d-78f2-4f57-9a91-52c0738028f2}"
    }
  }
}