Examine source code of DywidendaChart

{
  "manifest_version": 2,
  "name": "DywidendaChart_extension",
  "version": "1.1",
  "description": "Dodawanie wykresu rocznego do strefainwestorow.pl.",
  "icons": {
    "16": "/icons/page-16.png",
    "32": "/icons/page-32.png",
    "48": "/icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://strefainwestorow.pl/*"
      ],
      "js": [
        "/wykres.js"
      ]
    }
  ],
  "permissions": [
    "webRequest",
    "*://*.duckduckgo.com/*",
    "*://*.gpw.pl/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9fd53468-9857-41c9-9c87-37a320179345}"
    }
  }
}