Examine source code of Homely

{
  "manifest_version": 2,
  "name": "Homely",
  "version": "1.0",
  "description": "Customised new tab page.",
  "icons": {
    "64": "icons/fireplace.png"
  },
  "permissions": [
    "bookmarks",
    "search",
    "topSites",
    "tabs",
    "storage",
    "https://www.metaweather.com/*",
    "https://suggestqueries.google.com/*",
    "https://besticon-demo.herokuapp.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "homely@iaincattermole"
    }
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}