Trezor Bridge is the communication layer historically used to connect Trezor hardware wallets to web browsers and desktop applications. It acts as a local intermediary that enables secure USB communication between a user’s computer and the Trezor device, ensuring that sensitive actions such as transaction signing require explicit, physical confirmation on the device itself.
Modern browsers restrict direct access to USB devices for security and consistency reasons. The Bridge solves this by providing a trusted, locally running process that web apps (or Trezor Suite) can talk to safely, without granting the web page direct USB access.
The security model of Trezor Bridge depends on two pillars:
Trezor has shifted its user experience toward Trezor Suite — a single official application that integrates device management, updates, and wallets. Over recent releases the standalone Bridge was deprecated in favor of integrated approaches (Suite or updated communication methods) to streamline security and maintenance.
Deprecation means Trezor recommends uninstalling older standalone Bridge installations when using modern Suite releases — this avoids conflicts and ensures you run software that receives updates and security fixes as part of the official Suite lifecycle.
When installing Trezor Suite or Bridge components, follow official download and verification steps: verify signatures or checksums where provided so you are sure you installed authentic, untampered software.
1) Plug the Trezor into your USB port. 2) Use the official Suite or a supported browser flow to connect. 3) Confirm the connection and each transaction on the device screen. If a website asks for a connection and you’re not expecting it, disconnect and verify the origin of the request.
Always keep your Trezor device firmware, Trezor Suite, and any bridge/daemon software updated from official sources. Updates often include security fixes and improvements.
Whenever possible, verify downloaded installers using the publisher’s signature or checksum verification instructions to ensure authenticity.
Only connect your Trezor to websites you trust. Remember that Bridge merely transports messages — your device’s screen approval is the final gatekeeper.
Trezor’s open-source ecosystem includes communication daemons, helper libraries, and repositories on GitHub where developers can review code, raising transparency and auditability. Developers integrating with Trezor should review official repositories and follow recommended API/communication patterns.
If you discover a security issue, use the vendor’s security/bug-bounty channels to report it responsibly — this helps protect all users and ensures coordinated disclosure.