What Trezor Bridge actually does
Trezor Bridge runs locally on your computer and translates secure USB messages between your browser and a Trezor hardware wallet. Unlike web-only extensions that keep keys in the browser, Trezor Bridge ensures your private keys never leave the device; it simply forwards requests to sign transactions and returns confirmations. That separation is the core security benefit that makes hardware wallets like Trezor valuable.
How to install Trezor Bridge safely
Installing Trezor Bridge is a one-time local setup. Always download the installer from the official Trezor website (trezor.io) and verify the address in your browser. During installation, the Bridge creates a local service that listens for incoming connections only from trusted web apps. After installation you may need to refresh your browser and reconnect the device to complete the handshake.
Troubleshooting common Trezor Bridge issues
Occasionally browsers or operating systems change permissions and the Bridge needs a restart. If your Trezor is not recognized: try reconnecting the USB cable, restart the Bridge service, check that the browser tab has permission to access the device, or temporarily disable interfering extensions. For macOS and Windows, OS-level security prompts can block USB access — approving those prompts usually fixes recognition problems.
Security and privacy considerations with Trezor Bridge
Trezor Bridge itself does not store keys or personal data; it merely facilitates communication. Still, be cautious: only allow Bridge access for known sites (e.g., your chosen wallet interface). Avoid approving unexpected requests or signing transactions you don’t recognize. Treat your recovery seed as the single most important secret — neither Bridge nor any service should ever ask for it.
Integrations and developer notes for Trezor Bridge
Developers building WebUSB or WebHID integrations can use Trezor Bridge as a stable, cross-platform shim. It exposes a predictable local endpoint so wallets like Trezor Suite, MetaMask (with hardware integration), and browser-based dApps can communicate reliably with the device. For custom integrations, follow Trezor's developer documentation and test on hardware in a controlled environment.
Everyday workflow with Trezor Bridge
Once installed, Trezor Bridge becomes almost invisible: you connect the device, open your wallet site, and approve actions on the device screen. That simplicity is intentional — hardware wallets trade a little friction for dramatically stronger security. Keep your Bridge updated to receive small compatibility improvements and security fixes delivered by the Trezor team.