--- title: "Announcing Web Serial Support in Firefox" url: https://daily.dev/posts/announcing-web-serial-support-in-firefox-wzzjvlyhc source_url: https://hacks.mozilla.org/2026/05/web-serial-support-in-firefox type: article source: "Mozilla Hacks" published: 2026-05-21T18:06:10.741Z updated: 2026-06-25T02:15:56.714Z tags: ["firefox", "javascript"] reading_time: 5 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Announcing Web Serial Support in Firefox **[Mozilla Hacks](https://daily.dev/sources/hacks)** · 5 min read · 0 upvotes · 0 comments ## Summary Firefox 151 for Desktop now supports the Web Serial API, enabling web applications to communicate directly with serial-connected hardware like microcontrollers, development boards, 3D printers, and USB power meters without native software. The implementation was tested with Adafruit's CircuitPython workflows and supports devices like ESP32 boards, Raspberry Pi Picos, and LEGO devices. Security is handled via explicit user permission prompts using add-on gating, with no device enumeration or fingerprinting exposure. Mozilla is also pursuing standardization of the Web Serial API through WHATWG. Enterprise deployments have Web Serial disabled by default with policy controls available. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Build Adafruit projects right from Firefox](https://daily.dev/posts/build-adafruit-projects-right-from-firefox-xcmr3qtu7) · Hacker News · 1 upvotes · 0 comments - [GitHub - ArcaneNibble/awawausb: WebUSB for fopses](https://daily.dev/posts/github---arcanenibble-awawausb-webusb-for-fopses-gwnwbpisb) · Hacker News · 0 upvotes · 0 comments --- Tags: [#firefox](https://daily.dev/tags/firefox), [#javascript](https://daily.dev/tags/javascript) [View this post on daily.dev](https://daily.dev/posts/announcing-web-serial-support-in-firefox-wzzjvlyhc)