OpiBrowse

A Chromium browser that tunnels every request through its own server by default — no launcher, no extra step, and it fails closed instead of quietly leaking direct traffic.

Installer OpiBrowse-Setup.exe

Installs to your user profile and checks for updates in the background — security fixes and new features land automatically.

Download for Windows
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Portable OpiBrowse-portable.zip

Unzip and run — nothing touches the registry. Checks for updates itself and replaces only the files that changed.

Download ZIP
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What's actually in this build

Always-on tunnel, fails closed
The browser starts its own tunnel and forces its own proxy — kill the tunnel and pages simply stop loading instead of silently going direct.
Shipped
No WebRTC IP leak
WebRTC is locked to the proxied path natively, not by a launch flag — verified against browserleaks.com.
Shipped
No first-run screen
Opens straight to a usable tab. No setup wizard, no "make us your default" tour.
Shipped
Built-in ad blocking
The blocking engine is vendored and compiles in-tree; it isn't wired up to actually block requests yet. Not shipped in this build.
In progress
WebRTC through the tunnel, per site
Voice/video calls are disabled by the leak lockdown above. Routing them through the tunnel instead, with a per-site allow list, is unbuilt.
Planned
Translucent window chrome
Adjustable-intensity blur behind the toolbar and tab strip. Unbuilt.
Planned

How updates work

Installed copy

Checks /latest.json periodically. When the version differs, it downloads the new installer and re-runs it silently in the background — you'll see the new version next time you restart the browser.

Portable copy

Same version check, different fix: it downloads only the files that changed against a signed manifest and swaps them in place the next time the browser isn't running. The zip you downloaded is only ever needed once.