I Put a Full JVM Inside a Browser Tab. It "Works". Technically. Eventually.
Summary
The article documents a proof-of-concept called JavaBox that runs a full JVM inside a browser tab using WebAssembly and QEMU, booted from a Cloudflare Worker. It details performance numbers, a persistent CompileServer daemon to avoid long restarts, and potential use cases like in-browser tutorials, while noting it is not production-ready and discussing security implications.