On Sat, 23 Dec 2017 20:59:20 +0100, Michael Logies
wrote:

I`m using Freedome VPN and Surfeasy (free and paid version included
with Opera) and can recommend them.

VPN is completely different from a proxy, so the Freedom VPN isn't going to
answer the question, and I agree that the Opera proxy is usable - but as
stated in the OP - the Opera proxy only works with one browser.

The quest is to find a free proxy that works outside of the Opera browser.

Does anyone know of a usable free proxy that works for all browsers?