Firefox Adds Web Serial Support

Firefox Finally Adds Web Serial Support — What It Means for EZmation Devices

For years, browser-based hardware control had one frustrating limitation: if you wanted a website to directly communicate with serial devices, you typically needed a Chromium-based browser such as Chrome or Edge. That requirement just changed.

Mozilla recently announced support for the Web Serial API in Firefox, allowing websites to communicate directly with serial-connected hardware from inside the browser itself. The goal is simple: eliminate separate applications, installers, and middleware, and allow hardware to be controlled directly from web applications.

For EZmation customers, this opens up some interesting possibilities.

Instead of:

  • Installing dedicated desktop software
  • Building custom applications
  • Managing browser compatibility issues
  • Deploying separate communication layers

You can increasingly move toward:

  • Browser-based dashboards
  • Web-hosted control interfaces
  • Direct device configuration
  • Simple remote hardware interaction

Firefox users can now join Chrome and Edge users in accessing serial-enabled hardware directly through modern web applications.

What Is Web Serial?

The Web Serial API gives websites access to devices that appear as serial ports to the operating system. That includes traditional RS232 hardware as well as USB devices that expose virtual COM ports.

Examples include:

  • Microcontrollers
  • USB relay devices
  • Infrared controllers
  • Sensor systems
  • Power controllers
  • Embedded hardware

A web page can request access to a device, establish a connection, and exchange data using JavaScript.

Imagine opening a browser, clicking Connect Device, and immediately controlling hardware.

No application installation required.

EZmation Devices That Can Benefit

Several EZmation products already use serial or USB serial communication and are natural candidates for browser-based integration.

RS232 Power Control System

The EZmation 8-port RS232 Power Control Metal Case provides serial-controlled power management for equipment, labs, AV systems, and automation environments.

Potential browser-based applications:

  • Remote power cycling
  • Web-based control panels
  • Equipment monitoring dashboards
  • Lab automation interfaces
  • Automated testing systems

Instead of launching a standalone application, a web page could directly send commands to switch outlets on or off.

RS232 Power Control Metal Case

USB Infrared Transmitter

The EZmation Arduino-based USB IR Transmitter allows software to send IR commands to televisions, media players, projectors, air conditioners, and other consumer devices.

Browser-based opportunities include:

  • Home automation dashboards
  • Browser-based universal remotes
  • Smart conference room controls
  • Kiosk control systems
  • AV automation interfaces

A web application could allow users to press a button and immediately transmit IR commands without any desktop software layer.

Arduino-Based USB IR Transmitter

USB Infrared Receiver

The EZmation Arduino-based USB IR Receiver captures and decodes infrared signals.

Potential browser integrations:

  • Browser-based IR learning tools
  • Remote capture applications
  • Device setup utilities
  • Home automation configuration pages

Instead of downloading a utility program, users could capture and analyze IR commands directly from a web page.

Arduino-Based USB IR Receiver

Mini USB Relay Contact Closure

The Mini USB Relay Contact Closure device can control relays directly through USB communication.

Potential web-based uses:

  • Triggering external devices
  • Browser-controlled automation
  • Test fixture control
  • Home automation
  • Industrial interfaces

Imagine opening a webpage that activates relays with a single click.

No drivers. No separate control software.

Mini USB Relay Contact Closure

Why This Matters for Automation Developers

The bigger story isn't Firefox support itself.

The real shift is that hardware and web applications are becoming tightly integrated.

Instead of creating:

  • Native Windows applications
  • Platform-specific installers
  • Separate desktop interfaces

Developers can increasingly create:

  • Cross-platform web applications
  • Cloud-hosted dashboards
  • Browser-based device management
  • Simplified customer experiences

This reduces deployment complexity and lowers barriers for customers using EZmation hardware.

A single web application can work across operating systems and now across more browsers as well.