1Password actually bundles it with everything they ship (browser, desktop, even their golang cli): https://github.com/1Password/onepassword-sdk-go/tree/v0.1.7/... and then use extism to cross over its boundary https://github.com/1Password/onepassword-sdk-go/blob/v0.1.7/...

They compiled their rust libraries to wasm and it allows reuse of those rust bits across everything

The other famous example I know of, but haven't used, is Figma https://www.figma.com/blog/webassembly-cut-figmas-load-time-...