Comment 10 for bug 16669

A ssl enabled squid would help many users, which are concerned about the lack of anonymity in the web.

With request_header_replace where are a lot of guides to fix some information leaks for your users.
But all effort is failing if https is used.
To test this, have a look on https://panopticlick.eff.org/
You see that the origin User-Agent and not the rewritten User-Agent is reported.

Another point is that more and more sites are migration to https. This will reduce the traffic reduction of squid because the lack of https caching.