Examine source code of SpeedWorker Sticker

{
  "author": "PcSdk",
  "browser_action": {
    "default_icon": {
      "19": "/images/icon19.png",
      "38": "/images/icon38.png"
    },
    "default_title": "Настройки",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://login.vk.com/*",
        "https://vk.com/*"
      ],
      "js": [
        "vk.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://api.vk.com/*"
      ],
      "js": [
        "vk_token.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://api.vk.com/*"
      ],
      "js": [
        "error.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "description": "Встречайте! Шерстяные хвостатые комочки Натра и Оркинус в сообщениях ВК. Можно добавить в телеграмме по ссылке: https://t.me/addstickers/Natra",
  "icons": {
    "32": "/images/icon32.png",
    "64": "/images/icon64.png",
    "128": "/images/icon128.png"
  },
  "manifest_version": 2,
  "name": "SpeedWorker Sticker",
  "permissions": [
    "storage"
  ],
  "version": "1.1resigned1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{39bce292-eb7f-4f19-9467-eb9299a8dbc1}"
    }
  }
}