Trezor Bridge

Trezor Bridge is a lightweight, background application developed by SatoshiLabs. It serves as a secure communication layer between your Trezor hardware wallet and web-based interfaces like Trezor Suite or compatible dApps. It replaces outdated browser extensions, offering greater stability, enhanced security, and seamless compatibility across operating systems and browsers. It does not store your keys or sensitive data—only you control those on your device. :contentReference[oaicite:0]{index=0}

Why You Need Trezor Bridge

• **Improved Compatibility** – Works with major browsers such as Chrome, Firefox, and Edge, without needing plugins or extensions. :contentReference[oaicite:1]{index=1}
• **Enhanced Security** – Acts as a local, encrypted layer, reducing exposure to browser vulnerabilities. :contentReference[oaicite:2]{index=2}
• **Seamless Experience** – Once installed, Bridge auto-launches and runs silently in the background whenever needed. :contentReference[oaicite:3]{index=3}
• **Supports Multiple Platforms** – Available on Windows, macOS, and Linux. :contentReference[oaicite:4]{index=4}
• **No Private Keys Stored** – Only facilitates communication; your PIN and keys remain secure on the device. :contentReference[oaicite:5]{index=5}

How Trezor Bridge Works

Installation Guide

1. Visit trezor.io/start to download Bridge for your OS. :contentReference[oaicite:7]{index=7}
2. Run the installer (e.g., .exe on Windows, .pkg on macOS, or use package manager on Linux). :contentReference[oaicite:8]{index=8}
3. Restart your browser, connect your Trezor wallet, and open Trezor Suite or a supported dApp.
4. When prompted, authorise the connection via your device screen—ensuring the site is authentic. :contentReference[oaicite:9]{index=9}

Bridge vs. WebUSB and Legacy Extensions

• Older browser extensions (like Trezor Connect) were phased out due to compatibility and security limitations. Bridge replaces them with a more reliable system. :contentReference[oaicite:11]{index=11}
• WebUSB allows direct browser communication with hardware, but is not universally supported. Bridge ensures consistent access across environments. :contentReference[oaicite:12]{index=12}
• In restricted environments—like Tor Browser or older Firefox—you may still need Bridge. Bridge ensures smooth functionality. :contentReference[oaicite:13]{index=13}

Security & Privacy Insights

Bridge is open-source and signed by SatoshiLabs. It doesn’t collect personal data or interact with your funds—it only helps with communication. Even if a malicious version were used, your Trezor device still protects you by verifying transaction details on-screen before any signing. :contentReference[oaicite:14]{index=14}

Common Troubleshooting Steps

• Ensure Bridge is running (check system tray or menu bar) and restart your browser if needed. :contentReference[oaicite:15]{index=15}
• Try a different USB port/cable—faulty hardware is a common culprit. :contentReference[oaicite:16]{index=16}
• Allow permissions when prompted in your browser to connect to your device.
• On Linux, avoid conflicts with older Bridge instances like ‘trezord’. :contentReference[oaicite:17]{index=17}
• Use a browser that natively supports WebUSB if your Bridge isn't required. :contentReference[oaicite:18]{index=18}

Looking Ahead: The Future of Trezor Bridge

Trezor is progressively integrating Bridge functionality directly into the Trezor Suite application, targeting a future where standalone Bridge may no longer be necessary. Suite users may enjoy a more streamlined experience with fewer components to manage. :contentReference[oaicite:19]{index=19}

FAQ

Is Trezor Bridge safe?

Yes—it is open-source, signed by SatoshiLabs, and runs locally. It cannot access your private keys or PIN. Always download from the official site to avoid imposters. :contentReference[oaicite:20]{index=20}

Do I need it if I use desktop Suite?

No—desktop or mobile apps of Trezor Suite communicate directly with your device and don’t require Bridge. :contentReference[oaicite:21]{index=21}

Can Bridge inject malicious transactions?

No—every transaction must be physically confirmed on the device screen, showing destination and amounts. :contentReference[oaicite:22]{index=22}

Why does Bridge run on those local ports?

It establishes a secure local HTTP interface to communicate safely between browser and device. This also helps filter untrusted domains. :contentReference[oaicite:23]{index=23}