Examine source code of Website Blocker 2023

{
  "manifest_version": 2,
  "name": "Website Blocker",
  "version": "1.0",
  "description": "Block websites permanently or for a certain time.",
  "default_locale": "en",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "64": "icon64.png"
  },
  "background": {
    "scripts": [
      "event.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{50963390-0849-456e-816d-d027dd1f2ea1}"
    }
  }
}