Examine source code of 1 Speed & Volume Booster

{
  "manifest_version": 3,
  "name": "1 Speed & Volume Booster",
  "version": "2.1.0",
  "description": "Boost volume up to 600% and control playback speed on any streaming site. Free. No ads. No malware. Updated 2026.",
  "browser_specific_settings": {
    "gecko": {
      "id": "1-speed-volume-booster@amyhackmann.com",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "128.0"
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "1 Speed & Volume Booster",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lock.js"
      ],
      "all_frames": true,
      "match_about_blank": true,
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true,
      "match_about_blank": true,
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}