I'm trying to set 127.0.0.1 as a proxy for Firefox (for use with burp suit) as shown as below picture. But it is not working. The browser is continuously showing the message "The proxy server is refusing connections" What should I do? Thanks in advance.
In browser, you have set proxy port no as 3128 and in Burp default port is 8080 for proxy setting. Make sure that both ports are same and also verify the same in FoxyProxy or other addon if used for proxy.
To change Burp proxy settings, Open Burp Suite, and change proxy settings from Option button in Proxy menu.