Examine source code of Super Volume

{
  "manifest_version": 3,
  "name": "Super Volume",
  "version": "1.0.0",
  "description": "Fixes muted audio, bypasses browser autoplay restrictions, and boosts volume up to 600% on all streaming sites.",
  "permissions": [
    "storage",
    "activeTab",
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "*://*.wcostream.com/*",
    "*://*.wcostream.tv/*",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wcostream.com/*",
        "*://*.wcostream.tv/*",
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "cors_rules",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "audio-restorer-booster@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}