Proxychains: I can't figure out how to make it work

[Here](https://pastebin.com/FiXiPJ4R) is my config file. The proxy I use for testing comes from [here](http://free-proxy.cz/en/proxylist/country/GB/https/ping/all) . *I don't want to use Tor.* I just want a normal proxy. When I run for example proxychains firefox-esr ipleak.net: * if I use exactly the config file from above, I get the error:

error: invalid item in proxylist section: https 185.198.189.21 8080

* if I change https to http, I have no error in my terminal, the browser starts, but the page won't load and gives me an error after some time: What am I doing wrong?