Examine source code of EasyLyrics

{
  "manifest_version": 3,
  "name": "EasyLyrics",
  "version": "1.0.7",
  "description": "Открывайте текста любимых треков в один клик!",
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "EasyLyrics",
    "default_icon": "icons/icon128.png"
  },
  "permissions": [],
  "host_permissions": [
    "https://api.genius.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://vk.com/*",
        "http://vk.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "easylyrics@cookiexzero",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}