Examine source code of AudioSaver-Pro

{
  "manifest_version": 2,
  "name": "AudioSaver for YouTube",
  "short_name": "AudioSaver",
  "version": "1.6.0",
  "description": "Stream YouTube videos as pure audio. Blocks video tracks at network layer to save up to 48% bandwidth vs 144p, with iOS 26 Dynamic Island interface.",
  "author": "0xmv999exe",
  "homepage_url": "https://www.linkedin.com/in/0xmv999exe",
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-audio-saver-pro@antigravity.addon",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "tabs",
    "*://*.youtube.com/*",
    "*://*.googlevideo.com/*"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://youtube.com/*"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "web_accessible_resources": [
    "content/inject.js",
    "icons/icon-128.png",
    "icons/icon.svg"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "AudioSaver",
    "default_popup": "popup/popup.html"
  }
}