Trezor Bridge is a background service application that enables secure communication between your Trezor® hardware wallet and web browsers. It acts as a translator that allows JavaScript in web pages (like the Trezor Suite web interface) to interact with your USB-connected Trezor® device safely and efficiently.
Unlike browser extensions that might pose security risks, Trezor® Bridge runs as a separate application on your computer, creating a secure channel that maintains the isolation between your Trezor® device and potentially vulnerable web environments.
Web browsers have strict security policies that prevent websites from directly accessing USB devices. Trezor Bridge solves this challenge by:
Note: The desktop version of Trezor Suite has built-in communication capabilities and doesn't require separate Bridge installation.
When you first visit the web version of Trezor Suite at suite.trezor.io with your Trezor® device connected, the platform will automatically detect if Bridge is missing and prompt you to install it.
If automatic installation doesn't occur, you can manually install Trezor Bridge:
Step 1: Visit the official Trezor Bridge download page
Step 2: Download the appropriate version for your operating system
Step 3: Run the installer and follow the on-screen instructions
Step 4: Restart your browser after installation completes
Once installed, Trezor Bridge runs automatically in the background whenever needed, requiring no manual intervention for the Trezor Bridge login process.
It's important to understand the distinction between these two components:
When you use the web version of Trezor Suite, both components work together: Bridge handles device communication while Suite provides the user interface. The desktop version of Suite includes Bridge functionality natively.
Ensure the Bridge service is running in your system tray/menu bar. Try reinstalling Bridge or restarting your computer.
Try a different USB cable or port. Some USB 3.0 ports may have compatibility issues with older cables.
Disable any browser extensions that might interfere with USB device communication.
Ensure your firewall isn't blocking Trezor Bridge from establishing local connections.
Do I need Trezor Bridge if I use the desktop Trezor Suite?
No, the desktop version of Trezor Suite has built-in device communication capabilities and doesn't require a separate Bridge installation. Bridge is only necessary for the web version of Trezor Suite.
Is Trezor Bridge safe to install on my computer?
Yes, Trezor Bridge is developed and signed by SatoshiLabs, the makers of Trezor®. It only facilitates communication between your browser and device and doesn't have access to your private keys or recovery seed.
Why does Trezor Bridge need to be installed instead of working as a browser extension?
Browser extensions have broader permissions that could potentially be exploited. By running as a separate application, Bridge maintains better security isolation while still enabling web browsers to communicate with your device.
Can I use my Trezor® without installing Bridge?
Yes, you can use the desktop version of Trezor Suite (which doesn't require Bridge) or other compatible wallets like Electrum or MyEtherWallet that have their own device communication methods.
Do I need to manually start Trezor Bridge each time?
No, once installed, Trezor Bridge runs as a background service that automatically activates when needed. The Trezor Bridge login process is automatic and requires no user intervention.
What should I do if Bridge stops working after a browser update?
Browser updates occasionally break communication with Bridge. Usually, simply restarting your browser resolves the issue. If problems persist, try reinstalling Trezor Bridge or using the desktop Suite application instead.