Examine source code of PurePitch432 — 432Hz Converter for Spotify

{
  "manifest_version": 3,
  "name": "PurePitch432 — 432Hz Converter for Spotify",
  "short_name": "PurePitch432",
  "version": "1.0.7",
  "description": "Stream Spotify & Apple Music in 432 Hz — real-time pitch conversion directly in your browser.",
  "permissions": [
    "storage",
    "tabs",
    "alarms",
    "scripting"
  ],
  "host_permissions": [
    "https://open.spotify.com/*"
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_popup": "popup.html",
    "default_title": "PurePitch432"
  },
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "purepitch432@liberdade.de",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://open.spotify.com/*"
      ],
      "js": [
        "browser-polyfill.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    },
    {
      "matches": [
        "https://open.spotify.com/*"
      ],
      "js": [
        "content-bridge.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ]
}