Examine source code of PajacykWEx

{
  "manifest_version": 2,
  "name": "PajacykWEx",
  "version": "1.1resigned1",
  "author": "Adam Leks",
  "description": "Raz dziennie otwiera stronę Pajacyk.pl",
  "applications": {
    "gecko": {
      "id": "pajacykWEx@kiedywakacje.pl",
      "strict_min_version": "57.0"
    }
  },
  "icons": {
    "48": "icons/pajacyk48.png",
    "96": "icons/pajacyk96.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}