Proxy server - ArchWiki - Arch Linux
https://wiki.archlinux.org/title/ProxyThis method is helpful while using a desktop environment like Xfce which does not provide an option for proxy configuration. For example, Chromium browser will make use of the variables set using this method while running XFCE. Alternatively, there is a tool named proxyman-git AUR which claims to configure system-wide proxy settings easily.