Examine source code of Site Access Delayer

{
  "manifest_version": 2,
  "name": "Site Access Delayer",
  "version": "1.1.1",
  "description": "Take a mindful pause before visiting distracting websites. Adds a 10-second waiting page to help you think before browsing time-wasting sites.",
  "homepage_url": "https://github.com/baldajakub/site_access_delayer",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "waiting.html",
    "waiting.js"
  ],
  "browser_action": {
    "default_title": "Site Access Delayer Settings",
    "default_popup": "settings.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "site-access-delayer@baldajakub",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}