Actually they aren't only browser based. You can run native code: Behold: https://www.chromium.org/nativeclient/pnacl/introduction-to-portable-native-client h

Actually they aren't only browser based. You can run native code: Behold: https://www.chromium.org/nativeclient/pnacl/introduction-to-portable-native-client https://www.chromium.org/nativeclient/pnacl/introduction-to-... It's an amazing & beautiful feat of engineering. I'm unclear about it's feature - I suspect webassembly may become a standards-based equivalent that makes NaCL and PNaCL unnecessary.