Examine source code of Dev Start

{
  "manifest_version": 3,
  "name": "Dev Start",
  "version": "0.3.0",
  "description": "A grouped, keyboard-first new tab page for your most-used links.",
  "author": "Ali Haghayegh",
  "browser_specific_settings": {
    "gecko": {
      "id": "dev-start@ali-haghayegh",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "permissions": [
    "storage"
  ]
}