This document discusses techniques for predicting user activity and prerendering web pages to improve page load times. It notes current median page load times of 2.3-4.3 seconds and proposes using idle time between user actions like typing a URL to prefetch and render pages the user is likely to navigate to next based on their browsing history and habits. The document outlines Google Chrome's implementation of this using the omnibox search suggestions to predict and prerender likely future pages, showing how it has resulted in over 15% of omnibox navigations being nearly instant by preloading pages. It encourages web developers to ensure their sites can support prerendering.