Deploy and Host Firefox (Cloud Browser) on Railway

This template runs a full desktop Firefox browser in the cloud, streamed to any device through the linuxserver.io Selkies web interface. Open your Railway domain, log in, and you're inside a real browser running on the server — bookmarks, extensions, downloads, and sessions persist between visits.

About Hosting Firefox

The service streams a GPU-less desktop Firefox over WebSockets with the linuxserver.io Selkies stack. Access is gated by HTTP basic auth (CUSTOM_USER / generated PASSWORD), and the browser profile persists on a volume at /config. Set FIREFOX_CLI to a URL to open it at launch.

Common Use Cases

Disposable browsing environment isolated from your real machine and network — open sketchy links without them touching your device
Firefox-specific testing (Gecko rendering, Firefox extensions, container tabs) without installing it locally
Persistent browser session with a stable egress IP: stay logged in to sites, resume long downloads, keep tabs running 24/7
Quick cross-check of geo-dependent or region-blocked content from a datacenter vantage point
Kiosk-style shared browser for a team (one URL, one login, same session state)

Dependencies for Firefox Hosting

None — single service, no database

Deployment Dependencies

Implementation Details

First use: open your Railway domain, log in with CUSTOM_USER and the generated PASSWORD (service Variables tab), and the desktop appears. On touch devices, use the sidebar for keyboard and gestures.

Notes and limits:

Keep the login strong: an open cloud browser is a proxy for whoever finds it. The password gate is the whole security model — don't remove it.
Rendering is CPU-based (no GPU on Railway). Fine for browsing and light video; not for WebGL-heavy work.
Firefox is memory-hungry: give the service 1–2 GB. Heavy tab hoarding needs more.
Looking for Chromium instead? The same author publishes a Chromium template.
Traffic egresses from Railway's IP range — sites that block datacenter IPs (some streaming services) may object.
Abuse note: this is a browser, not an anonymizer. Use it within Railway's terms of service and the laws that apply to you.

Why Deploy Firefox on Railway?

Railway is a singular platform to deploy your infrastructure stack. Railway will host your infrastructure so you don't have to deal with configuration, while allowing you to vertically and horizontally scale it.

By deploying Firefox on Railway, you are one step closer to supporting a complete full-stack application with minimal burden. Host your servers, databases, AI agents, and more on Railway.