Examine source code of Fluent New Tab

{
  "manifest_version" : 3 ,
  "name" : "Fluent New Tab",
  "version" : "4.10",
  "description" : "A minimalist, customizable New Tab page inspired by Fluent Design.",
  "default_locale" : "en_US" ,
  "icons" : {
    "16" : "assets/icon-16.png",
    "32" : "assets/icon-32.png",
    "48" : "assets/icon-48.png",
    "128" : "assets/icon-128.png"
  },
  "chrome_settings_overrides" : {
    "homepage" : "index.html"
  },
  "chrome_url_overrides" : {
    "newtab" : "index.html"
  },
  "background" : {
    "scripts" : [
      "assets/background.ts.js" 
    ]
  },
  "action" : {
    "default_icon" : "assets/icon-48.png"
  },
  "content_security_policy" : {
    "extension_pages": "script-src 'self'; object-src 'self'; img-src 'self' data: blob: https: http:;"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fluentnewtab@dreyw",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions" : [
    "storage" ,
    "unlimitedStorage" ,
    "search" ,
    "alarms" 
  ],
  "optional_permissions" : [
    "bookmarks" 
  ],
  "optional_host_permissions" : [
    "https://duckduckgo.com/*" ,
    "https://peapix.com/*" ,
    "https://img.peapix.com/*" ,
    "https://commons.wikimedia.org/*" ,
    "https://upload.wikimedia.org/*" ,
    "https://geocoding-api.open-meteo.com/*" ,
    "https://api.open-meteo.com/*" ,
    "https://air-quality-api.open-meteo.com/*" ,
    "https://unsplash.snw-mint.workers.dev/*" ,
    "https://pexels.snw-mint.workers.dev/*" ,
    "https://*/*" 
  ]
}