Examine source code of Iframe Google Slides

{
  "manifest_version": 2,
  "name": "Iframe Google Slides",
  "version": "0.0.2",
  "description": "Converts textbox URLs to Iframes. ",
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/presentation/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "dist/styles.css"
      ]
    }
  ],
  "icons": {
    "16": "logo/icon-16.png",
    "32": "logo/icon-32.png",
    "48": "logo/icon-48.png",
    "128": "logo/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "iframe-google-slides@yourdomain.com"
    }
  }
}