Trezor Bridge vs WebUSB: What's the Difference and Which Should You Use?

When setting up a Trezor hardware wallet, one of the first decisions you’ll face is how your computer communicates with the device. You’ll come across two options: Trezor Bridge and WebUSB. Both serve the same essential purpose — allowing your computer to interact with your Trezor securely — but they work in different ways and are suited for different use cases.

In this post, we’ll break down the differences between Trezor Bridge and WebUSB, how each one works, and when it makes sense to use one over the other.

What Is Trezor Bridge?

Trezor Bridge is a small background application that runs on your computer. It acts as a communication layer between your Trezor device and your web browser or the Trezor Suite desktop application.

Here’s how it works:

  • When you connect your Trezor to your computer, the Bridge software helps the browser or app recognize the device and send/receive data securely.
  • It supports all major browsers and operating systems.
  • It’s required if you’re using the Trezor web interface (wallet.trezor.io) or older tools.

Key features of Trezor Bridge:

  • Persistent and stable communication with your device.
  • Works with multiple browsers (Chrome, Firefox, Edge, etc.).
  • Automatically updates in the background.
  • Allows deeper system-level integration.

To use Trezor Bridge, you download it from the official Trezor website and install it on your computer. Once installed, it runs in the background and manages the connection to your Trezor whenever needed.

What Is WebUSB?

WebUSB is a modern browser API that allows web applications to communicate directly with USB devices — like your Trezor — without needing any additional software.

Trezor has integrated WebUSB as a plug-and-play method for connecting your device to supported browsers, especially Google Chrome and Chromium-based browsers like Brave or Edge.

Here’s how WebUSB works with Trezor:

  • When you visit a supported Trezor web interface, your browser detects the device and prompts you to authorize the connection directly.
  • No additional download or installation is required.
  • It’s useful on systems where installing software isn’t allowed (e.g., public or restricted devices).

Key features of WebUSB:

  • No need to install Bridge or any extra drivers.
  • Ideal for quick access or temporary use.
  • Works best with Chrome or Chromium-based browsers.
  • Connection must be approved each time manually.

Key Differences Between Trezor Bridge and WebUSB

Let’s compare the two side by side:

FeatureTrezor BridgeWebUSBInstallation requiredYesNoBrowser compatibilityAll major browsersPrimarily Chrome/Chromium-basedConnection persistenceStable, background serviceMust reconnect each sessionBest forDesktop use, frequent usersTemporary or quick accessSupported by Trezor SuiteYes (desktop app)NoIdeal for restricted devicesNo (requires install)Yes (browser only)


When to Use Trezor Bridge

You should use Trezor Bridge if:

  • You’re using the Trezor Suite desktop app (which depends on Bridge).
  • You want the most reliable and seamless experience on your computer.
  • You use browsers like Firefox, which don’t fully support WebUSB.
  • You’re a frequent user who needs a persistent connection to your Trezor.

Bridge is especially useful for anyone managing multiple accounts, using advanced features, or relying on long-term device access.

When to Use WebUSB

WebUSB is best suited for:

  • Occasional users or those accessing Trezor on a shared/public computer.
  • People who cannot install software due to restrictions (e.g., work computers).
  • Users who prefer not to run background services.
  • Chrome/Chromium users who want to connect quickly without setup.

It’s also handy for testing or traveling — you can plug in your device and use it directly in the browser without needing to install anything.

Security Considerations

Both Trezor Bridge and WebUSB are secure and officially supported by Trezor. Regardless of the method you choose:

  • Private keys never leave your Trezor device.
  • All sensitive actions (like sending transactions) must be physically confirmed on the device.
  • Trezor firmware ensures that even if your computer is compromised, your crypto remains secure.

However, always make sure you're using the official Trezor website and tools. Avoid browser extensions or software from unverified sources, and never share your recovery seed online.

Conclusion: Which Should You Choose?

  • Use Trezor Bridge if you're a frequent user on your own computer and want the most stable, seamless experience.
  • Use WebUSB if you need quick, temporary access — especially when you can’t install extra software.

Both options provide secure access to your Trezor wallet. The choice simply depends on your workflow and environment. Whichever method you choose, Trezor ensures that your digital assets are protected by some of the most trusted hardware security available.