Firefox 151 Adds Web Serial API Support for USB Devices

5 articles · Updated · Hackster.io · May 25

Firefox 151 for Desktop now supports the Web Serial API, letting web apps connect directly to USB and other serial hardware without requiring native software.
Mozilla said the feature enables browser-based IDEs to flash microcontrollers and supports devices such as development boards, 3D printers and power meters.
Per-site and per-port permission controls were added after Mozilla's earlier security concerns, with users prompted to approve a specific domain and choose a specific serial port.
Years of use in Chromium-based browsers without reported attacks helped shift Mozilla's stance, and the company is now pursuing broader standardization through a WHATWG workstream proposal.
Adafruit has already published a Page Playground demo, underscoring Firefox's push to make the browser more useful for makers, educators and hardware developers.

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