Examine source code of New Tab Gallery - SkyMoon

{
  "version": "3.2.3",
  "version_name": "3.2.3.2602",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "NewTabGallery-SkyMoon@skymoon.info",
      "strict_min_version": "126.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "host_permissions": [
    "https://cameraclub.kr/*"
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; connect-src https://cameraclub.kr https://*.cameraclub.kr; img-src 'self' https://cameraclub.kr https://*.cameraclub.kr data:; style-src 'self' 'unsafe-inline';"
  },
  "chrome_url_overrides": {
    "newtab": "h_newtab.html"
  },
  "options_page": "h_newtab.html?setup=setup",
  "action": {
    "default_popup": "h_newtab.html?setup=setup&close=close",
    "default_icon": {
      "16": "icons/icon_tab16.png",
      "32": "icons/icon_tab32.png"
    }
  },
  "default_locale": "en",
  "description": "__MSG_appDesc__",
  "name": "__MSG_appName__",
  "author": "Sky Moon",
  "homepage_url": "https://skymoon.info/",
  "icons": {
    "16": "icons/icon_tab16.png",
    "32": "icons/icon_tab32.png",
    "48": "icons/icon_tab48.png",
    "128": "icons/icon_tab128.png",
    "256": "icons/icon_tab256.png"
  }
}