Hi, how do I POST nested JSON?

HTTPie supports "field:=json" syntax. HTTP Prompt doesn't support it now, but it's on my roadmap.

How does one block MacKeeper popups in Safari? Why isn't Safari blocking it?

uBlock - https://chrismatic.io/ublock/

ublock over adblock for safari ?

Personally, I just immediately close any website that has popup ads. They don't have anything I want. Also, use firefox :-)

2-3 more at czech technical university. faculty of electrical and mechanical engineering.

According to this site http://paternoster.archii.cz/seznam-paternosteru.html there are almost 30 of them in Prague.