Java, Flash, Silverlight, ActiveX? There were loads of technologies to run different languages in a browser, but they were all proprietary to a point; none of t

Java, Flash, Silverlight, ActiveX? There were loads of technologies to run different languages in a browser, but they were all proprietary to a point; none of them were a web standard, they all needed separate installation or a specific browser, and they were all basically black boxes in the browser. Whereas (from what I understand) wasm is a built-in browser standard. There was (is?) also asm.js, which IIRC was a subset of JS that removed any dynamicness so it would be a lot faster than vanilla JS. But again, no broadly carried / w3c standard.