Examine source code of GDV exporter

{
  "manifest_version": 2,
  "name": "GDV exporter",
  "description": "This extension allows the user to export record data from GDV website",
  "version": "0.2.12.2resigned1",
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "GDV Exporter"
  },
  "permissions": [
    "activeTab",
    "storage",
    "notifications",
    "https://spreadsheets.google.com/feeds/list/1bTRejM2CsRNCKKDRl9iAUzV8FZu4dh4XH4UNAl8WVKE/od6/public/values?alt=json-in-script&callback=data",
    "https://translate.yandex.net/api/v1.5/tr.json/translate?key=trnsl.1.1.20171017T074457Z.7bb61328a623d3e7.688014ec7ca547f5ae256771e7ee9512d2f99cc3&lang=de-en&format=plain"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.gdv-online.de/*"
      ],
      "js": [
        "exporter.js",
        "translator.js",
        "router.js",
        "formatter.js",
        "typecode-popup.js",
        "inline-typelist-parser.js",
        "harlem.js",
        "title.js"
      ]
    },
    {
      "matches": [
        "*://*.gdv-online.de/snetz/release2013/le*"
      ],
      "js": [
        "message/record.js",
        "message/meta-provider.js",
        "message/parser.js",
        "message/ui.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e3e39ac0-42d7-4fc7-a758-511e972eaac5}"
    }
  }
}