# rustnn implements W3C WebNN for Firefox in Rust > Source: > Published: 2026-06-28 00:03:46+00:00 Industry context: Browser-native ML APIs lower deployment friction for client-side inference and make web apps a meaningful execution target for practitioners. According to a blog post on ziade.org, the author built **rustnn**, a Rust (with Python bindings) implementation of the W3C `WebNN` specification aimed at supporting **Firefox**. The post describes using **Claude Code** to accelerate development, enumerating **95** operators and validating implementations against **WPT** conformance tests. The author reports implementing CoreML and ONNX converters and validating against existing executors, and notes Chromium's implementation and test corpus as useful references. The post also says performance tests have been started and that matching Chromium's maturity will likely take months, per the blog.