Undetectable Browser 2.50.0 Update: SOCKS5 Proxies with UDP, Chromium 152, and Other Fixes.

We continue to develop Undetectable so that working with profiles becomes more convenient for you, and protection against detection becomes even more reliable. In version 2.50.0, we implemented a long-awaited proxy technology and updated the browser base. In today’s article, we’ll take a detailed look at exactly what has changed and how it will affect your workflow.

SOCKS5 Proxy Support with UDP: A New Level of Masking

We have implemented UDP protocol support for SOCKS5 proxies. The feature is currently being launched in test mode. Network infrastructures are extremely diverse, and it is physically difficult to cover every possible scenario with tests, so we would greatly appreciate your feedback. If you encounter any nuances when working with UDP, be sure to contact our technical support.

What exactly does UDP support provide?

First and foremost, it fundamentally changes how WebRTC works. Now the connection goes directly through the proxy, without additional redirects or workarounds. This makes WebRTC spoofing as clean and natural as possible for anti-fraud systems. In addition, your browser starts fully supporting the modern QUIC protocol (HTTP3), which is increasingly used by major platforms.

For your convenience, we added the “Proxy with UDP support” checkbox directly to the SOCKS5 settings. The interface logic is very simple: if the proxy actually supports UDP, the icon will turn green during the check. If there is no support, the indicator will be red. The enable option can also be set in the default settings, so you don’t have to waste time when creating new sessions.

An important technical nuance: We do not recommend enabling the “Proxy with UDP support” option if your proxies do not actually support UDP. If you activate the option on regular proxies, WebRTC will stop working. This is not critical, but for a correct fingerprint it is better to use it only where it is truly supported.

If you work via the API or import proxies in bulk, we have added a new format — socks5u. Now the string looks like this: socks5u://127.0.0.1:1234:login:pass. You can check how the QUIC protocol works on specialized checkers, such as browserleaks, or directly in DevTools on Google sites.

Keep in mind that QUIC is sensitive to the network and may fail to start even in a regular browser, for example, because a VPN is enabled.

Chromium 152

We updated the browser engine to version 152. Platform protection algorithms do not stand still; they constantly analyze how quickly users switch to new Chrome versions. A delay in browser core updates is always an invisible marker that lowers the initial trust of your profiles.

Switching to Chromium 152 ensures that your sessions match current global internet traffic. You get correct rendering of the newest website elements and proper handling of updated JavaScript methods. This eliminates random page freezes in advertising dashboards and protects your accounts from unnecessary checks.

What We Fixed

We resolved two issues that could interfere with automation.

• Window settings on launch. We fixed a conflict between launch type options (always on top, minimized, maximized). Previously, they could work incorrectly if you also used the --window-position or --window-size flags. Now window positioning strictly follows your settings, which is critically important for keeping your desktop organized during mass launches.
• API stability under load. We fixed an issue that caused the main program window to crash when the API was running in multithreaded mode. The software now handles load much more confidently.

Conclusion

Undetectable 2.50.0 makes your multi-accounting even more advanced and predictable. Direct WebRTC operation through UDP and support for the QUIC protocol bring network fingerprint masking to a new quality standard. The up-to-date Chromium 152 core provides a high level of trust from modern platforms.

Update to the latest version, test the new proxy formats, and share your impressions. We continue working to ensure that Undetectable remains the most convenient tool for your projects.