Examine source code of Defuse Timer

{
  "manifest_version": 3,
  "name": "Defuse Timer",
  "version": "0.3.11",
  "description": "Viewer-side spike/bomb countdown for Valorant & CS2 streams. Auto-detects the plant from the stream and runs a detonation timer.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Defuse Timer",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "defuse-timer@mx-92x",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.twitch.tv/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "fonts/poppins-400.woff2",
        "fonts/poppins-600.woff2",
        "fonts/poppins-700.woff2",
        "fonts/poppins-800.woff2"
      ],
      "matches": [
        "*://*.youtube.com/*",
        "*://*.twitch.tv/*"
      ]
    }
  ]
}