Examine source code of Prism New Tab

{
  "manifest_version": 2,
  "name": "Container New Tab",
  "version": "1.2",
  "description": "Opens a custom new tab page with buttons for each container, specified URLs, and customizable backgrounds.",
  "permissions": [
    "tabs",
    "contextualIdentities",
    "cookies",
    "storage",
    "<all_urls>",
    "unlimitedStorage"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "photo1.avif",
    "photo2.avif",
    "photo3.avif",
    "photo4.avif",
    "photo5.avif",
    "abstract1.avif",
    "abstract2.avif",
    "abstract3.avif",
    "abstract4.avif",
    "abstract5.avif",
    "abstract6.avif",
    "abstract7.avif",
    "abstract8.avif",
    "settings.png",
    "home.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{943003ee-5aba-47c7-9546-2a23a64eb763}"
    }
  }
}