Examine source code of Dhikr - Browser Extension

{
  "manifest_version": 2,
  "name": "Dhikr.xyz",
  "version": "2.1",
  "description": "A small companion of your daily Dhikr.",
  "browser_action": {
    "default_icon": "images/dhikr_gray.png"
  },
  "icons": {
    "16": "images/dhikr_gray.png",
    "48": "images/dhikr_gray.png",
    "128": "images/dhikr_gray.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  }
}