Trézór Bridge® | Introducing the New Trézór App – Trezor Official Guide

Table of Contents

1. What is Trézór Bridge®?
2. Why it's Essential for Your Security
3. Differences from the Old Browser Extension
4. Who Needs Trézór Bridge® – and When
5. Supported Operating Systems & Browsers
6. Step-by-Step Installation Guide
   • Windows, macOS, Linux
   • Post-install browser restart
7. How Trézór Bridge® Works with Trezor Suite® Web and Desktop
8. Understanding the New “Trézór App” Ecosystem
9. Setup Flow on Trezor.io/Start
10. Secure Communication: Technical Overview
11. Security Features & Threat Mitigation
12. Auto‑Updates, Diagnostics & Versioning
13. Troubleshooting Common Issues
14. FAQ – Key Questions Answered
15. Compatibility and Legacy Support
16. When You DON’T Need Bridge (Using Desktop App)
17. Release Notes & Version Highlights (v22.9.3 etc.)
18. Real‑User Insights & Support Tips
19. Best Practices for Secure Use
20. Final Thoughts & Next Steps

1. What Is Trézór Bridge®?

Trézór Bridge® is a lightweight background application created by SatoshiLabs to securely connect your Trezor hardware wallet to your web browser. Unlike deprecated browser extensions, Bridge runs at the operating system level and enables encrypted communication whenever interacting via the Trezor Suite web interface (suite.trezor.io). Reddit+13bridge.trozre.com+13help-bridge-trezor.gorgias.help+13bridge.trzor.us+5Trezor Bridge+5en-docs-bridge.teachable.com+5bridge-docs-trzor-en.gitbook.io+3help-bridge-trezor.gorgias.help+3Trezor Bridge+3bridge.trzor.usbridges.trzor.usbridge-docs-en-trzor.gitbook.io+1bridge-doc-trzor.gitbook.io+1bridge-doc-trzor.gitbook.io+2en-docs-bridge.teachable.com+2Reddit+2

2. Why It's Essential for Your Security

Bridge allows communication between your browser and the Trezor device while ensuring:

• Private keys remain offline
• Transactions are signed on-device only
• No browser plugin vulnerabilities ➡ Bridge encrypts and isolates USB communication, safeguarding your crypto from phishing or malware. bridges.trzor.us+2bridge.trzor.us+2en-docs-bridge.teachable.com+2Reddit+2help-bridge-trezor.gorgias.help+2Trezor Bridge+2

3. Differences from the Old Browser Extension

Previously, Trezor required the Chrome Connector extension, which posed risks due to browser updates and extensions’ security exposure. Trézór Bridge® replaced that with:

FeatureBrowser ExtensionTrézór Bridge®Browser supportChrome onlyChrome, Firefox, EdgeSoftware layerBrowser pluginOS-level serviceSecurity riskHigher (extension-based)Lower (encrypted core)

4. Who Needs Trézór Bridge® – and When?

You only need to install Bridge if both apply:

1. You're using the Trezor Suite web interface
2. Your browser or OS does not fully support native WebUSB

In these cases, the trezor.io/start setup wizard will detect compatibility issues and prompt installation. Reddit+13Trezor Bridge+13en-docs-bridge.teachable.com+13

5. Supported Operating Systems & Browsers

Trézór Bridge® works on:

• Windows 10/11 (64-bit)
• macOS 10.15+
• Linux distributions (Debian, Ubuntu, Fedora)

Browser compatibility includes:

• Chrome, Edge, Firefox, Brave

Modern browsers on updated OSs may not need Bridge. The Trezor Suite Desktop App never requires it. Reddit+14bridges.trzor.us+14en-docs-bridge.teachable.com+14Trezor Bridge+1help-bridge-trezor.gorgias.help+1

6. Step‑by‑Step Installation Guide

Download & Install:

1. Visit the official site via trezor.io/start or trezor.io/trezor-bridge
2. Select your OS (Windows/macOS/Linux)
3. Run the installer:
   • Windows: follow wizard
   • macOS: drag to Applications
   • Linux: use .deb or package manager
4. Restart your browser to activate Bridge

Bridge then runs silently in the background (Tray/Activity Monitor sees trezord process). Trezor Bridgehelp-bridge-trezor.gorgias.help+1bridge-docs-trzor-en.gitbook.io+1bridge.trozre.com+1bridges.trzor.us+1secure-trezoor.github.io

7. How It Works with Trezor Suite (Web & Desktop)

Web Interface (suite.trezor.io):

• Bridge enables the browser to detect and communicate with your Trezor via local port (127.0.0.1:21325)
• Acts as encrypted proxy, relaying commands and approvals securely
• All sensitive signing occurs on-device bridge.trozre.com+15help-bridge-trezor.gorgias.help+15bridge-doc-trzor.gitbook.io+15

Desktop App:

• Does not use Bridge – communicates directly with the Trezor hardware via native USB protocols
• Bridge is unnecessary but may still run in background without harm Trezor Bridge

8. Introducing the New “Trézór App” Ecosystem

The name “Trézór App” refers to the modern interface family including:

• Trezor Suite Desktop
• Trezor Suite Web
• Potential upcoming Lite versions

Bridge is part of this ecosystem, ensuring communication is stable across platforms. bridge.trzor.us+2en-docs-bridge.teachable.com+2help-bridge-trezor.gorgias.help+2docs-trezo-bridge.gorgias.help+15bridge.trozre.com+15Trezor Bridge+15bridges.trzor.us+1Trezor Bridge+1

9. Setup Flow on Trezor.io/Start

1. Connect your Trezor device
2. Trezor.io detects if Bridge is required
3. Prompts installation if needed
4. Install Bridge and restart your browser
5. Log into Suite web interface: enter PIN on device, confirm access
6. Manage wallet features — send, receive, swap, stake

This streamlined onboarding avoids phishing attempts by only prompting builds from official domains. Reddit+6Trezor Bridge+6help-bridge-trezor.gorgias.help+6bridge.trzor.us+7bridges.trzor.us+7bridge.trozre.com+7

10. Secure Communication: Technical Overview

Bridge functions as a local HTTP service listening on 127.0.0.1:21325. When your browser initiates a connection:

• It sends handshake to Bridge
• Bridge recognizes the Trezor USB device
• Commands like firmware update or transaction signing are marshalled securely
• Bridge relays responses back via encrypted channels Because it runs at OS-level, it isolates the communication from browser vulnerabilities. help-bridge-trezor.gorgias.help

11. Security Features & Threat Mitigation

Key Security Enhancements:

• End-to-End Encryption of browser ↔ device data
• Firmware Authenticity Check on each new connection
• Man-in-the-Middle (MITM) Protection by isolating direct USB access
• Suspicious Connection Detection in newer Bridge versions bridges.trzor.us

Transactions must always be confirmed on the physical device display.

12. Auto‑Updates, Diagnostics & Versioning

• Bridge updates rarely; it's stable and only required on older setups
• New features arrive via Trezor Suite updates (v22.9.3 etc.)
• Diagnostics tools allow detection of conflicts (e.g. antivirus, VPN) Reddit+15bridge-docs-en-trzor.gitbook.io+15help-bridge-trezor.gorgias.help+15bridge.trozre.com

13. Troubleshooting Common Issues

Common Problems & Fixes:

• Browser unable to connect → restart browser or reinstall Bridge
• Bridge not running → check system tray for trezord
• Antivirus / VPN blocking → temporarily disable and retry
• Device not recognized → use original USB cable and port
• Still not working? Use official Support Center RedditTrezor Bridge+2help-bridge-trezor.gorgias.help+2secure-trezoor.github.io+2Reddit+2bridge.trozre.com+2bridge.trzor.us+2

Reddit feedback confirms:

14. Frequently Asked Questions

Q: Is Bridge required with desktop app? A: No, desktop app bypasses Bridge entirely.

Q: Does installing Bridge act as a login or wallet access? A: No — it is simply a background facilitator. Login occurs via entering PIN on device through Suite. Trezor Bridge

Q: Can I uninstall Bridge once my system is updated? A: Yes, if you use only the desktop app, Bridge is optional.

Q: Is Bridge safe? A: Yes — it's open source, encrypted, and developed by Trezor. docs-trezo-bridge.gorgias.help

Q: Does Bridge work on Android/macOS phones? A: No — Bridge is desktop-only. Mobile devices use other interfaces.

15. Compatibility & Legacy Support

Bridge ensures backward compatibility for users on:

• Older OS versions (e.g. macOS before WebUSB support)
• Less updated browsers (e.g. older Firefox or Chrome)

It bridges the gap until full WebUSB support becomes widespread. bridge-docs-trzor-en.gitbook.io+2Trezor Bridge+2Reddit+2

16. When You Don’t Need Bridge

Use Bridge-free setups when:

• You're using the Trezor Suite Desktop App (recommended)
• Browser & OS fully support WebUSB Trezor Suite desktop communicates directly with your device without Bridge. Trezor Bridge+1help-bridge-trezor.gorgias.help+1

17. Release Highlights (e.g. v22.9.3)

Bridge v22.9.3 introduced:

• Enhanced browser compatibility
• Additional OS support
• Improved diagnostics and install flow Other releases like Trezor Suite v25.x added support for new chains (Base, Arbitrum) and NFT interface—Bridge complements these features when using web version. bridge-docs-en-trzor.gitbook.io+1bridge-doc-trzor.gitbook.io+1Trezor BridgeReddit+1Reddit+1

18. Real‑User Insights & Support Tips

Reddit users share:

Advice:

• Use official portals, avoid random trolling domains
• Monitor Reddit for community pitfalls
• Follow support official channels Redditbridge-docs-en-trzor.gitbook.io+8Reddit+8bridge.trozre.com+8

19. Best Practices for Secure Use

• Always download Bridge from trezor.io/start
• Install only if prompted by official wizard
• After installation, restart browser and connect Trezor
• Confirm actions on-device; never enter PIN or seed in browser
• If switching to desktop app, uninstall Bridge to reduce background services
• Regularly update firmware and Suite for maximum protection bridge.trzor.us+15bridges.trzor.us+15Trezor Bridge+15Reddit+15Reddit+15help-bridge-trezor.gorgias.help+15Trezor Bridge+1secure-trezoor.github.io+1

20. Final Thoughts & Next Steps

Trézór Bridge® is a critical yet small piece of Trezor’s larger security architecture. It enables older or unsupported browser/OS environments to safely connect with your Trezor hardware wallet—bridging compatibility gaps without sacrificing privacy or user control.

If you're using modern systems or the Trezor Suite desktop app, Bridge becomes optional. Otherwise, when prompted via trezor.io/start, it's essential for secure browser-based wallet management.

✅ Recommended Next Steps:

• Use trezor.io/start to download Suite and install Bridge if required
• Complete “device login” by entering PIN on your device
• Explore sending, receiving, and DeFi/dApp functions in Suite
• Uninstall Bridge once on a fully compatible desktop setup