Examine source code of YouTube Time Machine

{
  "manifest_version": 3,
  "name": "YouTube Time Machine",
  "version": "1.1",
  "description": "Search for forgotten YouTube videos using old camera naming patterns",
  "permissions": [
    "tabs"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "libs/flatpickr/flatpickr.min.js",
        "libs/flatpickr/flatpickr.min.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "frank@frankmeeuwsen.com",
      "strict_min_version": "91.0"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  }
}