Firefox for Web Developers @webdevs.firefox.com · May 28 The Web Serial API landed in Firefox 151, allowing you to connect directly to microcontrollers, dev boards, 3D printers, power meters, and other serial-connected hardware from the web. Here's how it works:
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design an API API so everyone can create their own APIs
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Can I open multiple serial ports to different devices simultaneously?
See our announcement post for more detail, demos, and docs hacks.mozilla.org/2026/05/web-...