Examine source code of osu! Full Preview

{
  "manifest_version": 3,
  "name": "osu! Full Preview",
  "version": "1.1.0",
  "description": "Listen to full song previews on osu.ppy.sh beatmap listings. Click the button next to any beatmap to load the complete audio track.",
  "author": "Krrish",
  "homepage_url": "https://github.com/crashbydesign/osu-full-preview",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://osu.ppy.sh/*",
    "https://catboy.best/*",
    "https://central.catboy.best/*",
    "https://us.catboy.best/*",
    "https://sg.catboy.best/*"
  ],
  "icons": {
    "16": "images/icon.png",
    "32": "images/icon.png",
    "48": "images/icon.png",
    "128": "images/icon.png"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "images/icon.png",
      "32": "images/icon.png",
      "48": "images/icon.png",
      "128": "images/icon.png"
    },
    "default_title": "osu! Full Preview"
  },
  "content_scripts": [
    {
      "matches": [
        "https://osu.ppy.sh/*"
      ],
      "js": [
        "scripts/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "osu-full-preview@krrish",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}