Examine source code of Doge ify - Super Doge!

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Doge ify - Super Doge!",
  "short_name": "doge ify",
  "description": "A quick and fun way to spice up any website with Doge love. Refresh page to go back to normal.",
  "version": "1.1",
  "homepage_url": "https://github.com/adjavaherian/dogeify",
  "icons": {
    "16": "icon.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Super Dogeify!"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "activeTab",
    "https://www.reddit.com/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4cca6ce3-89b1-457f-979f-1f1afe72ea01}"
    }
  }
}