Examine source code of Reddit Default Sort

{
  "manifest_version": 2,
  "name": "Reddit Default Sort",
  "version": "1.1.2",
  "description": "Choose Reddit's default sorting method.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_action": {
    "default_title": "Reddit Default Sort",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "*://*.reddit.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit-default-hot@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}