An introduction to the new KV Storage API, built-in modules, and import maps.
ReportingObserver gives developers insight into what their code is doing in the wild. ReportingObserver surfaces information on issues like deprecations and interventions, messages that were previously only available in the DevTools console.
The Page Lifecycle API brings app lifecycle features common on mobile operating systems to the web. Browsers are now able to safely freeze and discard background pages to conserve resources, and developers can safely handle these interventions without affecting the user experience.
The non-standard chrome.loadTimes() API will be deprecated in Chrome 64 now that standards-based equivalents exist for all of its useful features.
The Device Memory API allows developers to serve different resources to users based on their device's memory capabilities.