If it is, we know the page was SSR'd and can avoid re-adding posts again. Search engine crawlers, social sharing platforms, [even browsers][lynx] have historically relied exclusively on static HTML markup to index the web and surface content. To keep a long-running browser instance, we can move the code that launches Chrome from the ssr() function and into the Express server: In my App Engine dashboard app, I setup a cron handler to periodically re-render the top pages on the site. Download the file for your platform. We need to tell the page its HTML is already in place. The problem is that its core feature (using the