To be fair, mozilla had a component-based architecture for the web since 1997 (called XUL). Some things were a bit odd to use but it worked pretty well and for

To be fair, mozilla had a component-based architecture for the web since 1997 (called XUL). Some things were a bit odd to use but it worked pretty well and for the next ~20 years, it was way ahead of HTML & co. in just about everything, including localization, accessibility and performance.