According to this, localhost is not forwarded to the proxy by default: http://kb.mozillazine.org/Network.proxy.no_proxies_on
My question is: How do I remove localhost as an exception?
The "No proxy for" field in my proxy options in firefox is already empty, but localhost is not being forwarded to the proxy.
network.proxy.no_proxies_on in about:config is also already empty.
My particular scenario that I'm trying to get to work:
I have two Windows 10 machines: Proxy server A and client B
Server A is is running bitvise ssh server. Client B connecting to it as a socks 5 proxy via Putty. The server A has a local web server running on the localhost:9001 that I want to access in Firefox from the client B.