stop http to http redirect

Since there is no mention what url your trying to get to no one will know what is happening.

How to I stop http to https redirect when I enter http:// as prefix?

https://support.mozilla.org/en-US/kb/https-only-prefs

http://kingma.myqnapcloud.com:3000

You should be able to just continue to the http:// site just like in the KB. see screenshots