Firefox Private Network: Mozilla has relaunched a Firefox test program, which was previously halted in January 2019.
The new feature it is currently testing is 'Firefox Private Network', a private proxy service powered by Cloudflare.

The company says the new service can be useful on networks you can't trust, like a public Wi-Fi network.
Once you connect to the service, it hides your IP address and the traffic between your computer and the proxy server is encrypted.
Your browser will establish a secure connection to the nearest Cloudflare data center, and Cloudflare's proxy server will protect you from malicious third parties.
Key Features of Firefox Private Network
Protection when you are on public WiFi hotspots. Whether you are waiting at the airport or in a coffee shop, your internet connection will be protected when you use the Firefox browser thanks to a secure tunnel over the web. All your sensitive information such as the web addresses you visit, personal and financial information will be protected.
Your Internet Protocol (IP) addresses will be hidden, making it harder to track you.
Your IP address is like a home address for your computer. One reason you might want to keep it hidden is to prevent ad networks from tracking your browsing history. Firefox Private Network will hide your IP address, providing protection from third-party trackers across the web.
Enable the service at any time. By clicking on the browser extension, you can enable or disable the service if you don't need it.
The feature is somewhat reminiscent of Opera's built-in VPN, which, despite the name, is also an encrypted proxy.
Firefox Private Network is available as a browser extension. It is currently limited to Firefox users residing in the United States. During testing, the service will be available for free. In the future, Mozilla may start charging for the security service.
