Privoxy is the current incarnation of Junkbuster. Privoxy has the ability to randomly modify web pages before sending them to the browser — for example, remove ‘<blink>’ or ‘<img>’ tags.
Just like its parent, Privoxy cannot do persistent connections. Under some circumstances, it will also buffer whole pages before sending them to the client, which significantly adds to its latency. However, this is difficult to avoid given the kinds of rewriting it attempts to perform.