yes but no, because they needed access to the OS for various services, all of which would have had to be isolated from the user code. Sun and Adobe woiod never

yes but no, because they needed access to the OS for various services, all of which would have had to be isolated from the user code. Sun and Adobe woiod never have done this. Chrome did it, Safari and Firefox followed. WASM runs in that environment. Flash/applets ran outside of that environment. they did that precisely to provide services the broswer didn't back then.