Chrome 74 introduces several features aimed at enhancing the developer experience, including the addition of private class fields in JavaScript, which complement the existing public class fields by allowing fields to be defined directly in the class definition with a "#" symbol to indicate privacy. The update also includes a media query called "prefers-reduced-motion" to cater to users sensitive to animations, enabling a more tailored web experience by disabling such effects when the preference is set. Developers can now listen for CSS transition events like transitionstart and transitionend, providing more control over animations and their behaviors. Chrome 74 also extends dark mode support to Windows users, following its introduction for Mac users in Chrome 73, offering a visually cohesive browsing experience reminiscent of incognito mode. Furthermore, the release introduces new feature policies that allow developers to manage website features and API behaviors more effectively, enhancing the customization of web applications. For more detailed updates and future release insights, users are directed to Google's official Chrome update site, chromestatus.com.