Examine source code of Devo

{
  "name": "Devo",
  "description": "GitHub Trending, Hacker News and Product Hunt, on every new tab!",
  "author": "Burak Karakan",
  "short_name": "Devo",
  "version": "1.10.1",
  "manifest_version": 2,
  "icons": {
    "16": "icons/icon-16.png",
    "24": "icons/icon-24.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "https://lobste.rs/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d590803d-ed3d-41f4-9473-582ed3e55423}"
    }
  }
}