Examine source code of Live Present Slides

{
  "name": "Live Present Slides",
  "description": "Make Google Slides appear in 'Present' mode while still being editable. Just hit fullscreen and you're good to go.",
  "version": "1.0",
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "Present!"
  },
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/presentation"
      ],
      "js": [
        "/contentScript.js"
      ]
    }
  ],
  "manifest_version": 2
}