It is a wasm pointer, not an OS pointer. You wouldn't actually get an address of OS memory, just to the addressable memory within the wasm VM. Getting isolatio

It is a wasm pointer, not an OS pointer. You wouldn't actually get an address of OS memory, just to the addressable memory within the wasm VM. Getting isolation between tabs does seem to be an ongoing concern, but that's happening regardless of the presence of wasm: https://v8.dev/blog/spectre#site-isolation https://v8.dev/blog/spectre#site-isolation