Examine source code of Hangar Link Connect

{
  "manifest_version": 2,
  "name": "Hangar Link Connect",
  "version": "1.3",
  "short_name": "Hangar Link Connect",
  "description": "Hangar Link Connect",
  "homepage_url": "https://hangar.link",
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://hangar.link/*"
      ],
      "js": [
        "scripts/content.js"
      ]
    }
  ],
  "permissions": [
    "https://robertsspaceindustries.com/*",
    "cookies"
  ],
  "browser_action": {
    "default_title": "Hangar Link",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  }
}