Examine source code of AeroKick

{
  "manifest_version": 2,
  "name": "AeroKick",
  "description": "Enhance the Kick.com experience!",
  "version": "2.10.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://aerokick.app/*",
        "https://ak.localhost/*",
        "https://beta.aerokick.app/*",
        "https://dashboard.kick.com/*",
        "https://kick.com/*"
      ],
      "run_at": "document_start",
      "css": [
        "content-scripts/mainland.css"
      ],
      "js": [
        "content-scripts/mainland.js"
      ],
      "world": "MAIN"
    },
    {
      "matches": [
        "https://aerokick.app/*",
        "https://ak.localhost/*",
        "https://beta.aerokick.app/*",
        "https://dashboard.kick.com/*",
        "https://kick.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/userland.js"
      ],
      "world": "ISOLATED"
    }
  ],
  "permissions": [
    "https://kick.com/*",
    "https://aerokick.app/*",
    "https://ak.localhost/*",
    "https://beta.aerokick.app/*",
    "https://dashboard.kick.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "admin@aerokick.app"
    }
  }
}