Examine source code of Tabiverse

{
  "name": "Tabiverse",
  "short_name": "Tabiverse",
  "version": "0.0.0.17",
  "description": "Turn your new tabs into a universe!",
  "manifest_version": 2,
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "offline_enabled": true,
  "chrome_settings_overrides": {
    "homepage": "index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Tabiverse"
  },
  "icons": {
    "256": "icon_256.png",
    "406": "icon_406.png"
  }
}