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<h2class="anchor anchorWithStickyNavbar_LWe7"id="properties">Properties<ahref="#properties"class="hash-link"aria-label="Direct link to Properties"title="Direct link to Properties"></a></h2>
<table><thead><tr><th>Property</th><th>Modifiers</th><th>Type</th><th>Description</th><th>Default</th></tr></thead><tbody><tr><td>baseUrl</td><td><code>optional</code></td><td>string</td><td>Determines the host that will be used for downloading.</td><td><p>Either</p><p>- <ahref="https://storage.googleapis.com/chrome-for-testing-public"target="_blank"rel="noopener noreferrer">https://storage.googleapis.com/chrome-for-testing-public</a> or - <ahref="https://archive.mozilla.org/pub/firefox/nightly/latest-mozilla-central"target="_blank"rel="noopener noreferrer">https://archive.mozilla.org/pub/firefox/nightly/latest-mozilla-central</a></p></td></tr><tr><td>browser</td><td></td><td><ahref="/next/browsers-api/browsers.browser">Browser</a></td><td>Determines which browser to install.</td><td></td></tr><tr><td>buildId</td><td></td><td>string</td><td>Determines which buildId to download. BuildId should uniquely identify binaries and they are used for caching.</td><td></td></tr><tr><td>cacheDir</td><td></td><td>string</td><td>Determines the path to download browsers to.</td><td></td></tr><tr><td>downloadProgressCallback</td><td><code>optional</code></td><td>(downloadedBytes: number, totalBytes: number) => void</td><td>Provides information about the progress of the download.</td><td></td></tr><tr><td>platform</td><td><code>optional</code></td><td><ahref="/next/browsers-api/browsers.browserplatform">BrowserPlatform</a></td><td>Determines which platform the browser will be suited for.</td><td><strong>Auto-detected.</strong></td></tr><tr><td>unpack</td><td><code>optional</code></td><td>boolean</td><td>Whether to unpack and install browser archives.</td><td><code>true</code></td></tr></tbody></table></div></article><navclass="pagination-nav docusaurus-mt-lg"aria-label="Docs pages"><aclass="pagination-nav__link pagination-nav__link--prev"href="/next/browsers-api/browsers.installedbrowser"><divclass="pagination-nav__sublabel">Previous</div><divclass="pagination-nav__label">InstalledBrowser</div></a><aclass="pagination-nav__link pagination-nav__link--next"href="/next/browsers-api/browsers.launchoptions"><divclass="pagination-nav__sublabel">Next</div><divclass="pagination-nav__label">LaunchOptions</div></a></nav></div></div><divclass="col col--3"><divclass="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ulclass="table-of-contents table-of-contents__left-border"><li><ahref="#properties"class="table-of-contents__link toc-highlight">Properties</a></li></ul></div></div></div></div></main></div></div></div><footerclass="footer footer--dark"><divclass="container container-fluid"><divclass="row footer__links"><divclass="col footer__col"><divclass="footer__title">Community</div><ulclass="footer__items clean-list"><liclass="footer__item"><ahref="https://stackoverflow.com/questions/tagged/puppeteer"target="_blank"rel="noopener noreferrer"class="footer__link-item">Stack Overflow<svgwidth="13.5"height="13.5"aria-hidden="true"viewBox="0 0 24 24"class="iconExternalLink_nPIU"><pathfill="currentColor"d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><liclass="footer__item"><ahref="https://twitter.com/chromedevtools"target="_blank"rel="noopener noreferrer"class="footer__link-item">Twitter<svgwidth="13.5"height="13.5"aria-hidden="true"viewBox="0 0 24 24"class="iconExternalLink_nPIU"><pathfill="currentColor"d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><liclass="footer__item"><ahref="https://goo.gle/devtools-youtube"target="_blank"rel="noopener noreferrer"class="footer__link-item">YouTube<svgwidth="13.5"height="13.5"aria-hidden="true"viewBox="0 0 24 24"class="iconExternalLink_nPIU"><pathfill="currentColor"d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div></div><divclass="footer__bottom text--center"><divcl