Today I was happy to learn about Proxydomo, meaning Proxomitron's legacy is alive and well on Windows. On the downside the website is a touch Japanese, but they have a less well-maintained English page here (https://www31.atwiki.jp/lafe/pages/44.html).
たぶん xp / vista / 7 / 8.1 でも動くはず
This software is a local proxy filtering software
It is made using open source Proximodo for creation.
Confirm operation with windows 10 64bit
Maybe it should work with xp / vista / 7 / 8.1
The Linux Proxomitron alternative is Privoxy, for those who'd like to dabble in these things. You can chain it with Squid to get around idiotic browser behaviors.