Examine source code of Ahoy!

{
  "manifest_version": 2,
  "name": "Ahoy!",
  "description": "Acede a todos os sites bloqueados em Portugal. Uma experiencia de internet livre e sem qualquer tipo de bloqueios.",
  "version": "2.0.1",
  "icons": {
    "16": "icons/color/16x16.png",
    "48": "icons/color/48x48.png",
    "128": "icons/color/128x128.png"
  },
  "applications": {
    "gecko": {
      "strict_min_version": "60.0"
    }
  },
  "background": {
    "scripts": [
      "ahoy.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/gray/19x19.png",
      "38": "icons/gray/38x38.png"
    },
    "default_title": "Ahoy!",
    "default_popup": "views/popup.html"
  },
  "permissions": [
    "alarms",
    "proxy",
    "storage",
    "tabs",
    "webRequest",
    "webNavigation",
    "webRequestBlocking",
    "<all_urls>",
    "*://*/"
  ]
}