A compact, practical walkthrough to understand what Trezor Bridge is, how to check or remove it, and how to use Trezor Suite (recommended modern alternative).
Trezor Bridge used to be the small helper application that bridges communication between your Trezor hardware device and web & desktop apps. It exposed a local web endpoint so wallets and browsers could talk to your Trezor securely. Today Trezor has migrated functionality into Trezor Suite and more robust transports; the standalone Bridge has been deprecated in favor of Suite and newer transport layers.
Download Trezor Suite for the simplest, secure experience — Suite includes modern device communication and removes the need for the standalone Bridge on most systems.
If you must install Bridge, use official packages and PGP signatures. If you already have a standalone Bridge, Trezor recommends uninstalling it and using Trezor Suite or the web methods that replace Bridge.
Official Bridge packages and installers are hosted on Trezor infrastructure (see the links below). For advanced users there are also GitHub repositories and tools used by developers.
Check Trezor's Support guides and the troubleshooting pages; they list step-by-step checks for Trezor Suite not seeing a device and how to resolve HID/WebUSB transport problems.