{"id":85966,"date":"2026-05-21T11:00:38","date_gmt":"2026-05-21T18:00:38","guid":{"rendered":"https:\/\/blog.mozilla.org\/?p=85966"},"modified":"2026-05-21T11:48:36","modified_gmt":"2026-05-21T18:48:36","slug":"firefox-web-serial-adafruit","status":"publish","type":"post","link":"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/","title":{"rendered":"Mozilla and Adafruit bring Web Serial workflows to Firefox"},"content":{"rendered":"\n
\"Firefox<\/figure>\n\n\n\n

Launching Web Serial in Firefox 151<\/h2>\n\n\n\n

The web is built by communities, but not all communities use the web the same way. <\/p>\n\n\n\n

That philosophy shaped part of this week\u2019s Firefox 151 release<\/a>, which introduced support for the Web Serial API on desktop<\/a>. Most folks won’t use this API, but for our community of builders and tinkerers, it unlocks the ability to use Firefox to communicate directly with compatible hardware devices like microcontrollers, development boards, and other serial-connected devices.<\/p>\n\n\n\n

For developers, makers, educators, hardware enthusiasts, and embedded-device communities, browser-based hardware workflows have increasingly become part of the modern web experience. With Firefox\u2019s browser engine, Gecko, now supporting Web Serial, users can now connect, code, configure, and control compatible hardware directly from the browser in many workflows, often without additional software or complicated setup. <\/p>\n\n\n\n

If you want to dive deeper into the technical details behind Web Serial support in Firefox 151, you can read our full engineering post here<\/a>.<\/p>\n\n\n\n

Adafruit collaboration<\/h2>\n\n\n\n

As part of this week\u2019s launch, Adafruit<\/a>, one of the internet\u2019s most beloved open-source hardware communities, is collaborating with us to test and validate what browser-based hardware development can look like in Firefox with Web Serial support.<\/p>\n\n\n\n

If you\u2019ve ever spent time with CircuitPython, browser-based board programming, custom controllers, sensors, classroom kits, STEM homework assignments, or a desk covered in blinking microcontrollers\u2014you probably already know Adafruit<\/a>.<\/p>\n\n\n\n

With Web Serial support in Firefox 151, Adafruit\u2019s browser-based hardware workflows now work directly in Firefox as well, with no additional software or complicated setup required for many projects. We invite you to give it a try<\/a>. <\/p>\n\n\n\n

Different communities care about different browser experiences. Some people want simplicity, familiarity and productivity. Others want flexibility, customization, and tools that support the way they<\/em> work, build, experiment, and create. We want the web to be open, flexible, and shaped by the diversity of people building on it. <\/p>\n\n\n\n

If you’re wiring up your first board, experimenting with hardware projects, or dusting off an old electronics kit, give Adafruit and Web Serial in Firefox a try. <\/p>\n\n\n\n

Build something amazing. Make something useful. Tell us what works. Tell us what breaks. Most of all, make it your own.<\/p>\n\n\n\n\n

\n \"The <\/div>\n
\n

Take control of your internet<\/h3> Download Firefox<\/span> <\/div>\n<\/a>\n","protected":false},"excerpt":{"rendered":"

Launching Web Serial in Firefox 151 The web is built by communities, but not all communities use the web the same way.  That philosophy shaped part of this week\u2019s Firefox 151 release, which introduced support for the Web Serial API on desktop. Most folks won’t use this API, but for our community of builders and […]<\/p>\n","protected":false},"author":144,"featured_media":86037,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"coauthors":[464411],"acf":[],"yoast_head":"\nMozilla and Adafruit bring Web Serial workflows to Firefox<\/title>\n<meta name=\"description\" content=\"Web Serial in Firefox 151 helps makers connect, code and control Adafruit hardware projects directly in the browser.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/\",\"url\":\"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/\",\"name\":\"Mozilla and Adafruit bring Web Serial workflows to Firefox\",\"isPartOf\":{\"@id\":\"https:\/\/blog.mozilla.org\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blog.mozilla.org\/wp-content\/blogs.dir\/278\/files\/2026\/05\/Distilled_Adafruit_Header-scaled.jpg\",\"datePublished\":\"2026-05-21T18:00:38+00:00\",\"dateModified\":\"2026-05-21T18:48:36+00:00\",\"author\":{\"@id\":\"https:\/\/blog.mozilla.org\/en\/#\/schema\/person\/33edd7d4d73723140487082573041c83\"},\"description\":\"Web Serial in Firefox 151 helps makers connect, code and control Adafruit hardware projects directly in the browser.\",\"breadcrumb\":{\"@id\":\"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#primaryimage\",\"url\":\"https:\/\/blog.mozilla.org\/wp-content\/blogs.dir\/278\/files\/2026\/05\/Distilled_Adafruit_Header-scaled.jpg\",\"contentUrl\":\"https:\/\/blog.mozilla.org\/wp-content\/blogs.dir\/278\/files\/2026\/05\/Distilled_Adafruit_Header-scaled.jpg\",\"width\":2560,\"height\":1440,\"caption\":\"Firefox mascot organizing purple icons with a padlock\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/blog.mozilla.org\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Mozilla and Adafruit bring Web Serial workflows to Firefox\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blog.mozilla.org\/en\/#website\",\"url\":\"https:\/\/blog.mozilla.org\/en\/\",\"name\":\"The Mozilla Blog\",\"description\":\"News and Updates about Mozilla\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blog.mozilla.org\/en\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/blog.mozilla.org\/en\/#\/schema\/person\/33edd7d4d73723140487082573041c83\",\"name\":\"Mozilla\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/blog.mozilla.org\/en\/#\/schema\/person\/image\/f32381c01597770b1131dff44b9d6de1\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/f84bd67e8e3ab3bcc9676910aecf5700?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/f84bd67e8e3ab3bcc9676910aecf5700?s=96&d=mm&r=g\",\"caption\":\"Mozilla\"},\"url\":\"https:\/\/blog.mozilla.org\/en\/author\/mozilla\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Mozilla and Adafruit bring Web Serial workflows to Firefox","description":"Web Serial in Firefox 151 helps makers connect, code and control Adafruit hardware projects directly in the browser.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/","url":"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/","name":"Mozilla and Adafruit bring Web Serial workflows to Firefox","isPartOf":{"@id":"https:\/\/blog.mozilla.org\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#primaryimage"},"image":{"@id":"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#primaryimage"},"thumbnailUrl":"https:\/\/blog.mozilla.org\/wp-content\/blogs.dir\/278\/files\/2026\/05\/Distilled_Adafruit_Header-scaled.jpg","datePublished":"2026-05-21T18:00:38+00:00","dateModified":"2026-05-21T18:48:36+00:00","author":{"@id":"https:\/\/blog.mozilla.org\/en\/#\/schema\/person\/33edd7d4d73723140487082573041c83"},"description":"Web Serial in Firefox 151 helps makers connect, code and control Adafruit hardware projects directly in the browser.","breadcrumb":{"@id":"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#primaryimage","url":"https:\/\/blog.mozilla.org\/wp-content\/blogs.dir\/278\/files\/2026\/05\/Distilled_Adafruit_Header-scaled.jpg","contentUrl":"https:\/\/blog.mozilla.org\/wp-content\/blogs.dir\/278\/files\/2026\/05\/Distilled_Adafruit_Header-scaled.jpg","width":2560,"height":1440,"caption":"Firefox mascot organizing purple icons with a padlock"},{"@type":"BreadcrumbList","@id":"https:\/\/blog.mozilla.org\/en\/firefox\/firefox-web-serial-adafruit\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/blog.mozilla.org\/en\/"},{"@type":"ListItem","position":2,"name":"Mozilla and Adafruit bring Web Serial workflows to Firefox"}]},{"@type":"WebSite","@id":"https:\/\/blog.mozilla.org\/en\/#website","url":"https:\/\/blog.mozilla.org\/en\/","name":"The Mozilla Blog","description":"News and Updates about Mozilla","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blog.mozilla.org\/en\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/blog.mozilla.org\/en\/#\/schema\/person\/33edd7d4d73723140487082573041c83","name":"Mozilla","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blog.mozilla.org\/en\/#\/schema\/person\/image\/f32381c01597770b1131dff44b9d6de1","url":"https:\/\/secure.gravatar.com\/avatar\/f84bd67e8e3ab3bcc9676910aecf5700?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/f84bd67e8e3ab3bcc9676910aecf5700?s=96&d=mm&r=g","caption":"Mozilla"},"url":"https:\/\/blog.mozilla.org\/en\/author\/mozilla\/"}]}},"_links":{"self":[{"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/posts\/85966"}],"collection":[{"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/users\/144"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/comments?post=85966"}],"version-history":[{"count":0,"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/posts\/85966\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/media\/86037"}],"wp:attachment":[{"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/media?parent=85966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/categories?post=85966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/tags?post=85966"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/blog.mozilla.org\/en\/wp-json\/wp\/v2\/coauthors?post=85966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}