Connection settings in Firefox

Your organization or Internet Service Provider may offer or require you to use a proxy to connect to the Internet. Learn more.

How to disable proxy settings in Mozilla Firefox? – Support

How to Configure a Proxy Server in Firefox

Proxying localhost on FireFox

How to disable Proxy settings in Firefox using Registry or UI

Learn how To Configure Proxy Settings in Firefox - NetNut

FiddlerCap with Firefox - Fiddler - Telerik

How To Set Up a Proxy Server Connection in Firefox - GreenGeeks

Proxy settings in Mozilla Firefox

How to Configure a Mozilla Firefox Proxy

Easy to follow guide when setting up proxies in Firefox