Examine source code of Website Visit Limiter

{
  "manifest_version": 2,
  "name": "Website Visit Limiter",
  "version": "1.0",
  "description": "Limits visits to user-defined websites per day.",
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "alarms",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png"
    }
  },
  "icons": {
    "16": "icon.png"
  },
  "web_accessible_resources": [
    "blocked.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c548d49e-35d5-4986-a41a-0c9a13e39324}"
    }
  }
}