Examine source code of ZenR-NewTab

{
  "manifest_version": 2,
  "name": "ZenR-NewTab",
  "version": "2.0.3",
  "description": "A liquid-glass new tab bookmark manager with pages, boards, drag & drop, and custom wallpapers.",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "chrome_settings_overrides": {
    "homepage": "newtab.html"
  },
  "permissions": [
    "bookmarks",
    "storage",
    "https://pixabay.com/*",
    "https://suggestqueries.google.com/*",
    "https://api.bing.com/*",
    "https://duckduckgo.com/*",
    "https://api.qwant.com/*",
    "https://search.brave.com/*",
    "https://www.startpage.com/*",
    "https://catbox.moe/*",
    "https://formbold.com/*",
    "https://api.github.com/*",
    "https://gist.githubusercontent.com/*",
    "https://cdn.jsdelivr.net/*",
    "https://freesound.org/*",
    "https://cdn.freesound.org/*",
    "https://icons.duckduckgo.com/*",
    "https://raw.githubusercontent.com/*",
    "https://cdn.pixabay.com/*"
  ],
  "browser_action": {
    "default_title": "ZenR Bookmarks",
    "default_icon": {
      "128": "icon.png"
    }
  },
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "web_accessible_resources": [
    "default-bg.jpg",
    "intro.mp4"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; connect-src 'self' blob: https://formbold.com https://catbox.moe https://pixabay.com https://suggestqueries.google.com https://api.bing.com https://duckduckgo.com https://api.qwant.com https://search.brave.com https://www.startpage.com https://api.github.com https://gist.githubusercontent.com https://cdn.jsdelivr.net https://freesound.org https://cdn.freesound.org https://icons.duckduckgo.com https://raw.githubusercontent.com https://cdn.pixabay.com https://*.vimeocdn.com; img-src 'self' https: data: blob:; media-src 'self' blob: https://cdn.freesound.org https://cdn.pixabay.com https://*.vimeocdn.com https://*.vimeo.com;",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3b0baa5a-467b-4c1a-ab03-e8828a59a4a5}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}