Examine source code of ManagerFocus Tab

{
  "manifest_version": 3,
  "name": "ManagerFocus Tab",
  "version": "1.0.2",
  "description": "Productivity new tab with focus & manager modes",
  "browser_specific_settings": {
    "gecko": {
      "id": "focustab@extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "bookmarks"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; connect-src https:; frame-src https://www.meteoblue.com https://my.meteoblue.com https://docs.google.com"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  }
}