Trezor Bridge is (or historically was) a small background service that provided a secure channel between your desktop browser (or Trezor Suite) and a Trezor hardware wallet. It replaced older browser plugins to improve compatibility and security, acting as a mediator so websites and apps could interact with the device without exposing private keys.
Historically, browsers lacked a consistent, secure way to let web apps access USB hardware. Bridge created a predictable API surface and removed the need for browser extensions. It handled USB/HID access, session handling and message passing between apps and the physical Trezor device.
Important: Trezor has deprecated the standalone Bridge program and recommends moving to the official Trezor Suite and modern connection methods (for details see Trezor's guides). If Bridge is installed, follow the official deprecation and uninstall guidance to avoid future compatibility issues.
If you must install Bridge (older workflows), always use the official download and follow verification steps in Trezor's documentation. Modern users should prefer Trezor Suite (desktop or web) which handles device connections and updates more directly and safely.
Bridge historically worked with major browsers and OSes, but browser upgrades and native WebUSB support have changed the landscape. If you rely on Bridge, verify every major environment upgrade (browser/OS) before trusting a legacy workflow.
Trezor’s security model places the private keys on the device and never exposes them to the host computer. Communications (Bridge or other channels) only pass signed commands and responses; the critical operations (key generation and signing) happen on-device. Follow Trezor’s personal security standards: verify firmware, keep recovery phrases secret, and avoid unknown installers.
The main host-side threats are malicious host software or compromised installers. Mitigations include verifying downloads, limiting administrative privileges, using up-to-date OS/browser, and preferring official suite apps over third-party software.
Third-party wallets and dapps should use Trezor Connect or official libraries to interact with devices, following documented secure workflows and user-consent patterns so users confirm every critical action on the hardware itself.
Below are 10 official links (Trezor site, docs, and GitHub) you can use — included inside the page so users can click them directly while presenting.
Trezor Bridge played an important role transitioning away from legacy browser plugins. Today, the recommended approach is to use verified official apps (Trezor Suite) and developer tools (Trezor Connect). During presentations emphasize: never download from third-party mirrors, verify packages, and validate transactions on the device screen.
Prepared for presentation use: headings H1→H5 included for slide-like structure and printing. Edit the content easily in any HTML editor.