Examine source code of Page Load Delay

{
  "manifest_version": 2,
  "name": "Page Load Delay",
  "version": "0.0.2",
  "description": "Add friction to distracting websites with customizable countdown delays. Create groups of domains with different wait times to reduce impulsive browsing.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{42a40283-85d0-4020-8499-17a095a37194}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Page Load Delay",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    "countdown.html",
    "countdown.js"
  ]
}