Examine source code of FPZN

{
  "description": "Утилиты для ФПЗН Битрикс24",
  "manifest_version": 2,
  "name": "ФПЗН",
  "version": "2.1resigned1",
  "icons": {
    "48": "icons/fpzn-icon-48.png"
  },
  "permissions": [
    "activeTab"
  ],
  "applications": {
    "gecko": {
      "id": "frolov@intervolga.ru",
      "strict_min_version": "57.0"
    }
  },
  "browser_action": {
    "default_icon": "icons/fpzn-icon-32.png",
    "theme_icons": [
      {
        "light": "icons/fpzn-icon-32.png",
        "dark": "icons/fpzn-icon-32.png",
        "size": 32
      }
    ],
    "default_title": "ФПЗН",
    "default_popup": "popup/choose_action.html"
  }
}