Examine source code of Stratus - New Tab Page

{
  "manifest_version": 2,
  "name": "Stratus - New Tab page",
  "description": "A clean and fast new tab page",
  "version": "1.0.10",
  "homepage_url": "https://github.com/dineshkhadka/stratus",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f40b9e3c-502d-40d9-95bd-2b5a1fdd27d9}"
    }
  }
}