In the past years, all browser vendors have shipped new versions of Safari, Edge, Chrome, and Firefox, that include support for WebAssembly. And that makes all four major browsers able to run code compiled to the wasm format on the web.
WebAssembly is also simpler to read for browsers, giving a more structured data format and faster code parsing times. It also enables developers to write code in C, C++, or Rust, and compile it to wasm directly.
You can also try WebAssembly Explorer, which is an online tool that enables you to play around with a C/C++ compiler and learn how WebAssembly code is created, delivered, and ultimately used by the browser.