Examine source code of Darksouls Popups

{
  "manifest_version": 2,
  "name": "Darksouls Popups",
  "version": "1.0.0",
  "description": "Adds a Darksouls-esque popup whenever a button is clicked",
  "icons": {
    "48": "Icons/48x48-logo.png"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "Sounds/elden-ring-death.mp3"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5455f87e-7dfd-4104-b424-2c63a0aa1d26}"
    }
  }
}