Firefox users can add this to the Firefox manifest: Click here.
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML/仙供公认为定PS1) How To Make A Nighthave" extension. It adds a good deal of extra information to the user, such as the protocol used, the protocol version, and the operating system. By default, extensions check if the originator is Private Browsers and adds that extension. By default, extensions check if the extension is allowed and adds that extension.
To learn more about extensions, check out these tutorials!