What is Trezor Bridge and how it works
Trezor Bridge is the small local agent that lets the Trezor Suite and web pages communicate with Trezor hardware devices. Bridge runs on your host machine and forwards requests to the USB device; all signing happens on the hardware, meaning the secrets never leave the device. This separation is vital: Bridge simply moves messages between the host and the device while the Trezor enforces user confirmation and cryptographic signing.
Installing Trezor Bridge safely
Go to trezor.io/bridge and download the appropriate installer. For most users the default options are fine. After installation, restart the browser. If you see prompts from the OS firewall, allow local connections for the Bridge process only.
Reading logs & debugging
Advanced users can use the Bridge logs to inspect requests when troubleshooting. Logs show handshake attempts and potential errors, which helps determine whether an issue originates from Bridge, browser settings, or the device.
Security fundamentals
Never enter your recovery seed in any app. Only approve transactions visible on-device. Keep Bridge and Suite updated. If you are concerned about supply chain attacks, obtain your device from authorized resellers and inspect packaging for tamper evidence.
When to use the desktop Suite vs web
Trezor Suite Desktop includes Bridge-like capabilities built-in or uses local processes for reliability. The web version plus Bridge works well, but desktop is often more robust on locked-down systems.
Final notes
Bridge is not a security risk when used correctly — it is an essential enabling component for secure user workflows. Keep official links bookmarked and consult Trezor Support for unresolved issues.