Examine source code of QuietSkip Ads

{
  "manifest_version": 2,
  "name": "QuietSkip Ads",
  "version": "1.0.0",
  "description": "Detect likely ad segments (volume/brightness/length) and softly reduce volume + show countdown — does not skip.",
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "browser_action": {
    "default_title": "QuietSkip Ads",
    "default_icon": "icons/icon48.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "quietskip-ads@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}