Examine source code of Fun Fact Generator

{
  "manifest_version": 2,
  "name": "Fun Fact Generator",
  "version": "1.0",
  "description": "Display a fun fact for kids every time a new tab is opened.",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6908c3ce-bade-4bd1-a011-554cfd460bc7}"
    }
  }
}