Ruby 3.2 released ruby.wasm, allowing Ruby to run in the browser as WebAssembly. Several features were missing for comfortable programming. For example, require_relative to load other scripts, the new method to initialize JavaScript objects, and some converters between Ruby and JavaScript. I wrote three Ruby programs for the browser, found the missing features, and implemented them. I will introduce my work on ruby.wasm and talk a bit about features I will add in the future. Those who listen to this talk will feel that using Ruby in the browser is wonderful.