Examine source code of Yahoo New Tab

{
  "name": "Yahoo New Tab",
  "description": "Welcome to My Yahoo. Get your headlines, email, quotes and more — all in one place.",
  "manifest_version": 2,
  "version": "1.1resigned1",
  "homepage_url": "https://github.com/heubergen/yahoo-new-tab",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "icons": {
    "48": "./images/icon_48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0220de78-d398-47cb-8323-ebab3a845d01}"
    }
  }
}