https://blog.uproxy.org/2016/09/uproxy-adds-tor-support.html

This blog post says that uProxy gained support for proxying others' traffic through Tor.

uProxy client → censor → uProxy server → Tor → destination

In the classic uProxy deployment scenario, the client and server are people who know each other. (I say "classic" because there are other deployment modalities now.) They each run a browser extension. The client encapsulates its web traffic and sends it to the server over WebRTC. The server then issues the web requests and sends the responses back over the WebRTC channel.

A potential problem is that the uProxy server's own web browsing gets mixed up with that of the client. The client could, for example, get the server in trouble by accessing sketchy web sites. That's what the Tor integration is meant to solve.