Operating systems (or at least some common Linux distributions) are rather
terrible in handling HTTP proxies which are often used in corperate IT
infrasturctures. References to these proxy adresses are scattered all over
your system. If you need to do this configuration once that is annoying
but manageable. But if you have to change these settigs everyonce in a while
because for example you need to use your notebook in a network without
proxy things get quite unhandy.
proxyproxy solves that.
proxyproxy is open source and welcomes your contribution. Find the source on GitHub: https://github.com/unprofession-al/proxyproxy