Examine source code of Spotify Controll

{
  "manifest_version": 3,
  "name": "Spotify Controller",
  "version": "1.2.0",
  "description": "Control Spotify playback from your browser toolbar with a modern, dynamic UI",
  "author": "ossamahattan@gmail.com",
  "permissions": [
    "tabs",
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "*://open.spotify.com/*"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Spotify Controller",
    "default_icon": "icons/icon.svg"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "*://open.spotify.com/*"
      ],
      "js": [
        "content/content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "icons": {
    "16": "icons/icon.svg",
    "32": "icons/icon.svg",
    "48": "icons/icon.svg",
    "96": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "spotify-controller@oussama.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}