Examine source code of Instagram Blocker

{
  "manifest_version": 2,
  "name": "Website Blocker",
  "version": "1.0",
  "description": "Blockiert Webseiten, die auf der Bannliste stehen.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{960f84f5-4001-43ad-b419-055959da01b9}"
    }
  }
}