Trezõr® brïdge® || Connect Your Web3 World Securely
A colorful, practical guide to the lightweight native helper that links web apps, desktop tools and your hardware wallet — designed to keep private keys where they belong: offline and under your control.
Local Connector • Private • Trusted
Small app. Big responsibility.
Trezõr® brïdge® (Bridge) is the local bridge between browser-based Web3 apps or companion software and your Trezor-compatible hardware device. It handles device discovery and secure message relay without ever touching your sensitive secrets.
What is Trezõr® brïdge®?
Trezõr® brïdge® is a small native helper application installed on your computer (Windows / macOS / Linux). When a Web3-enabled website or the companion desktop app needs to talk to your hardware wallet, it connects to Bridge on localhost. Bridge then forwards the request to the connected Trezor-compatible device and returns signed responses — always preserving the rule that private keys and seed phrases never leave the hardware.
Core responsibilities
Discover and manage device sessions for local apps and websites.
Relay signing requests while ensuring session isolation and consent.
Offer a consistent cross-platform transport layer so developers don’t need per-browser hacks.
Trezõr® brïdge® acts like a courier: it carries messages between software and the device but never opens the envelope — the device does the reading and signing.
Where it fits in the stack
Browser / Web3 App ↔︎ Bridge (local) ↔︎ Hardware Wallet (USB/HID). This layered model keeps the secret material in the hardware and leaves the host machine as an untrusted—but useful—interface.
Security model — What Bridge does (and doesn't)
The single most important fact about Bridge is this: it does not and cannot access your private keys or recovery seed. The hardware wallet performs all cryptographic signing and shows transaction data on its display for explicit human approval. Bridge's role is to channel requests and responses between host software and the device.
Guarantees
Local-only relay: Bridge listens on localhost and keeps traffic on your machine.
No key extraction: Key material never leaves the hardware.
Session isolation: Apps must request access explicitly; Bridge does not blindly grant universal device access.
Limitations
While Bridge defends against remote attackers contacting your device, it cannot protect you from local malware that manipulates host applications or records screen content. The final line of defense remains the hardware display and your careful on-device verification.
Good host hygiene (updated OS, trusted apps, anti-malware) + always confirm actions on your hardware = robust practical security.
Developer guidance & integrations
Developers building Web3 integrations should treat Bridge as the recommended local transport for native device communication. Offer clear flows that request permission, notify users when a device action will require on-device confirmation, and provide graceful fallbacks if Bridge is not installed.
Best practices
Prompt users to install Bridge from the official domain when necessary.
Use explicit consent dialogs before requesting device actions.
Log and surface helpful error messages if the service is missing or blocked.
Troubleshooting & common issues
Device not recognized?
Check your USB cable: Use a known working data cable.
Restart Bridge: Quit and relaunch the Bridge service or re-run the installer.
Browser restart: Close all browser windows and reopen — permissions sometimes require a full relaunch.
Permissions or firewall blocks
Allow localhost binding and USB/HID access for Bridge only if you downloaded it from the official source. Firewalls or overly aggressive privacy tools may prevent Bridge from binding to the loopback interface.
Conflicts with other helpers
If multiple helper apps try to claim the device, uninstall older connectors or helpers to eliminate conflicts. Check logs and contact official support channels if necessary.