Examine source code of Default Sort for Reddit

{
  "manifest_version": 2,
  "name": "Default Sort for Reddit",
  "version": "1.0",
  "description": "Automatically sets your preferred default sorting method on Reddit.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "*://www.reddit.com/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "popup.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6956163-0c76-4f32-a8f7-ae1c03134a26}"
    }
  }
}