Examine source code of Star Citizen PTU Follow

{
  "manifest_version": 2,
  "name": "Star Citizen PTU Follow",
  "description": "This extension allows you to easily synchronize your contact list from LIVE to PTU account.",
  "version": "0.3.5",
  "author": "Kamille92",
  "permissions": [
    "cookies",
    "https://ptu.cloudimperiumgames.com/*",
    "https://robertsspaceindustries.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://ptu.cloudimperiumgames.com/*",
        "https://robertsspaceindustries.com/*"
      ],
      "css": [
        "css/fix.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/jquery-3.4.1.min.js",
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "img/icon_256.png",
    "default_title": "SC Follow - Settings",
    "default_popup": "html/popup.html"
  },
  "icons": {
    "64": "img/icon_64.png",
    "128": "img/icon_128.png",
    "256": "img/icon_256.png"
  }
}