Examine source code of Reddcoin tracker

{
  "manifest_version": 2,
  "name": "Reddcoin tracker",
  "description": "You can easily enter the Reddcoin amount you have and it will convert it to either Euros or Dollars(selectable).",
  "short_name": "Reddcoin tracker",
  "version": "1.0.2resigned1",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "background": {
    "page": "ignore.html"
  },
  "permissions": [
    "activeTab",
    "https://api.cryptonator.com/api"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{53e01412-077c-497f-8f0a-6f32d10c2e6b}"
    }
  }
}