Cross Browser Compatibility and Developer Tools Questions

Focuses on identifying and resolving cross browser rendering and behavior differences and using browser developer tools effectively. Topics include common cross browser issues for HTML, CSS, and JavaScript, vendor prefixes and experimental features, progressive enhancement and graceful degradation strategies, feature detection and polyfills, responsive and device specific testing, automated cross browser testing and continuous integration practices, and practical debugging techniques using browser developer tools such as DOM and CSS inspection, layout and repaint profiling, network throttling, device emulation, and console and performance tooling.