Examine source code of Web Presentation Clicker

{
  "manifest_version": 3,
  "name": "Web Presentation Clicker (on-stage.click)",
  "description": "Control your slideshow presentation with your phone in the simplest way possible. No app required.",
  "version": "0.2.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{14b8b2be-04ff-4a69-a953-bdd32417c750}",
      "strict_min_version": "112.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "panel/panel.html",
    "theme_icons": [
      {
        "dark": "icon-light/icon16.png",
        "light": "icon-dark/icon16.png",
        "size": 16
      },
      {
        "dark": "icon-light/icon32.png",
        "light": "icon-dark/icon32.png",
        "size": 32
      },
      {
        "dark": "icon-light/icon48.png",
        "light": "icon-dark/icon48.png",
        "size": 48
      },
      {
        "dark": "icon-light/icon128.png",
        "light": "icon-dark/icon128.png",
        "size": 128
      }
    ]
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "present.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/presentation/*"
      ],
      "js": [
        "content-clicker.js",
        "clickers/arrow-keys.js",
        "clickers/slides-clicker.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://powerpoint.officeapps.live.com/*"
      ],
      "js": [
        "content-clicker.js",
        "clickers/arrow-keys.js",
        "clickers/365-clicker.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ]
}