Overview
Trezor Bridge traditionally acted as a small local communication layer that allowed Trezor hardware wallets to talk securely with desktop browsers and apps (like Trezor Suite) over a trusted channel. It handled device discovery and message routing between the hardware device and the wallet software so users could sign transactions without exposing private keys. :contentReference[oaicite:0]{index=0}
Why Bridge matters
Many operating systems and browsers restrict direct USB access for security reasons. Trezor Bridge served as the sanctioned, minimal native helper that establishes a controlled route so the browser or Suite can interact with the device while keeping cryptographic secrets on the hardware. This separation helps reduce risk: sensitive signing happens on the device, not on the host. :contentReference[oaicite:1]{index=1}
Important status & recent change
Trezor has moved much of the user experience into the official Trezor Suite and has deprecated the standalone Bridge application in favor of improved integration and fewer moving parts. If you currently use standalone Bridge, check the official deprecation guide and the Suite for recommended steps. (Official guidance and migration details are published by Trezor). :contentReference[oaicite:2]{index=2}
What deprecation means for you
- New users should prefer Trezor Suite (desktop or web) for the most up-to-date, supported workflow.
- Existing installations of Bridge may remain functional, but you should follow Trezor's guidance and uninstall or update when asked for security and compatibility reasons.
- Developers can consult the Trezor communication daemon code and repo for technical details and alternatives. :contentReference[oaicite:3]{index=3}
How the connection works (technical summary)
Local daemon & USB layer
Historically, a small local daemon listened for USB HID or WebUSB events and exposed a secure local endpoint. Wallet software issued JSON-RPC style commands to the daemon; the daemon forwarded those to the device and returned cryptographic responses. The device always required user confirmation for signing operations.
Security model
The security model depends on several rules: private keys never leave the hardware, user verification (PIN / passphrase / on-device confirmations) is required for sensitive operations, and the host application cannot silently perform transactions without user approval. Trezor emphasizes open-source tooling and independent audits as part of their security posture. :contentReference[oaicite:4]{index=4}
Best practices for users
1. Use the official Trezor Suite
The Suite is the recommended, actively maintained app for setup, backups, firmware updates, and transactions — prefer it over third-party apps that rely on deprecated helpers. :contentReference[oaicite:5]{index=5}
2. Keep firmware & software updated
Apply firmware updates via Trezor Suite and only accept updates from official sources. Review firmware changelogs before applying updates. :contentReference[oaicite:6]{index=6}
3. Verify links & downloads
Only download Bridge, Suite, or installers from the official trezor.io domain or Trezor's authorised GitHub repos. Avoid unofficial mirrors. Check signatures when provided.
When to troubleshoot Bridge / connection issues
If your device is not recognized: ensure your OS supports required USB interfaces, uninstall older Bridge versions when directed, restart the Suite, and consult official support pages. Hardware issues (broken cable, damaged port) are common culprits — swap cables and ports first. :contentReference[oaicite:7]{index=7}
Developer notes
Developers building integrations should consult Trezor's communication daemon repositories and prefer modern, supported connection patterns that Trezor recommends — check the official repo and guidance before designing production integrations. :contentReference[oaicite:8]{index=8}