Examine source code of Auto Sort Tabs

{
  "manifest_version": 2,
  "name": "Auto Sort Tabs",
  "description": "Automatically sorts tabs to preferences",
  "version": "1.0",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon_32.png",
    "default_title": "Preferences",
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "32": "icons/icon_32.png",
    "64": "icons/icon_64.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "auto-sort-tabs@maelbox.github.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}