Examine source code of Stellar Photos

{
  "manifest_version": 3,
  "name": "Stellar Photos",
  "description": "Experience a beautiful high-resolution photo every time you open a new browser tab. Fast, customizable, and clutter-free.",
  "version": "5.0.0",
  "icons": {
    "48": "48.png",
    "64": "64.png",
    "128": "128.png"
  },
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "host_permissions": [
    "https://api.unsplash.com/*",
    "https://images.unsplash.com/*",
    "https://www.gstatic.com/prettyearth/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "stellar@stellarapp.photos",
      "strict_min_version": "153.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  }
}