Examine source code of Crypto Prices (Binance)

{
  "manifest_version": 2,
  "name": "Crypto Prices (Binance)",
  "version": "1.2.3resigned1",
  "applications": {
    "gecko": {
      "id": "cryptoprices.binanceaddon@gmail.com",
      "strict_min_version": "42.0"
    }
  },
  "description": "Prices of crypto currencies from Binance.com",
  "homepage_url": "https://www.binance.com/?ref=11267633",
  "icons": {
    "48": "icons/addon-logo-48.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage",
    "tabs",
    "https://api.binance.com/*",
    "webRequest"
  ],
  "browser_action": {
    "default_icon": "icons/addon-logo-48.png",
    "default_title": "Crypto",
    "default_popup": "show_prices.html"
  }
}