Examine source code of Spotify Lyrics

{
  "$schema": "https://raw.githubusercontent.com/extend-chrome/manifest-json-schema/main/schema/manifest.schema.json",
  "name": "__MSG_extensionName__",
  "version": "1.6.14",
  "manifest_version": 2,
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "web_accessible_resources": [
    "*"
  ],
  "permissions": [
    "scripting",
    "contextMenus",
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d5bcc68d-856a-41e2-8021-d4c51f3b8e4a}",
      "strict_min_version": "78.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://open.spotify.com/*",
        "*://music.163.com/*",
        "*://www.deezer.com/*",
        "*://music.youtube.com/*",
        "*://music.apple.com/*",
        "*://listen.tidal.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://open.spotify.com/*",
        "*://music.163.com/*",
        "*://www.deezer.com/*",
        "*://music.youtube.com/*",
        "*://music.apple.com/*",
        "*://listen.tidal.com/*"
      ],
      "js": [
        "options/index.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "commands": {
    "toggle": {
      "suggested_key": {
        "default": "Ctrl+Shift+L",
        "mac": "Command+Shift+L"
      },
      "description": "Toggle lyrics",
      "global": true
    }
  },
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/48.png"
    }
  }
}