how to download malware bytes in safe mode (network) I need some help?

I'm good in safe mode on the infected computer networks. need for get the malware bytes up downlad.com and download. but I get the massage Firefox is configured to use a proxy server is refusing connections doesn't Working in a safari or internet explorer either. What should I do? i have antivir virus.

> Open Internet Explorer came to Internet Options> Connections> LAN Settings, uncheck> "Use proxy for LAN connection, then you can download stuff and access to the Internet using Firefox.it is very important to do this in Internet Explorer as directed.