ShadowSocks only focuses on browsers or the whole network?

Hi Does ShadowSocks only focuse on browsers or the whole network?
I mean is it only for browsers?
I am asking this because I have read this https://www.tipsforchina.com/how-to-setup-a-fast-shadowsocks-server-on-vultr-vps-the-easy-way.html The “Limited support” Section I mean.
and Also because of this: When I downloaded Windscribe VPN to my desktop, it shows my real IP instead of ShadowSocks IP although ShadowSocks was on.
Thank You Very Much.

Hello? Is not this the support? May I get an Answer please?