Examine source code of Fairly Good

{
  "manifest_version": 2,
  "name": "Fairly Good",
  "version": "0.0.2",
  "description": "Brighten up your day by being greeted with a friendly message every time you open up a new tab",
  "icons": {
    "48": "icon.png",
    "96": "icon@2x.png"
  },
  "permissions": [
    "chrome://favicon/",
    "tabs"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "web_accessible_resources": [
    "main.js",
    "styles.css",
    "compliments.json",
    "toilet-paper.svg",
    "twitch.svg",
    "github.svg",
    "instagram.svg",
    "twitter.svg",
    "icon@2x.png",
    "icon.png"
  ]
}