selenium proxy configuration multiple times in same browser - selenium

Question

I opened a browser(any) with selenium tool and applying proxy to that browser by this below posted code, below is for Firefox
//LINE 1 FirefoxProfile profile = new FirefoxProfile();
//LINE 2 profile.setPreference("network.proxy.http", configuration
.getProxyConfiguration().getHostname());
//LINE 3 profile.setPreference("network.proxy.http_port", configuration
.getProxyConfiguration().getPort());
//LINE 4 profile.setPreference("network.proxy.type", configuration
.getProxyConfiguration().getType().toInt());
//LINE 5 return new FirefoxDriver(profile);
Now, I want to apply another proxy configuration for the same browser(Because, If I use another browser, session will be get change, So.... I want to apply my changes to that browser itself). How to apply my proxy configuration to the same browser. When I use same code I've to return driver which uses "NEW". I showed in my code(//LINE 5). Please help me to solve this issue.
Thanks:
Ramakrishna K.C

Answer 1

You can create Proxy with Kind = ProxyKind.System
new Proxy { Kind = ProxyKind.System};
Then update the internet settings in the registry
var proxyServer = string.Format("http={0};https={0}", ipAddressAndPort);
var proxyEnable = enableProxy ? 1 : 0;
const string subKeyPath = #"Software\Microsoft\Windows\CurrentVersion\Internet Settings";
using (var subKey = Registry.CurrentUser.CreateSubKey(subKeyPath))
{
if (subKey == null)
{
throw new Exception(string.Format("Failed to create or open subKey. SubKeyPath: {0} ", subKeyPath));
}
subKey.SetValue("ProxyServer", proxyServer, RegistryValueKind.String);
subKey.SetValue("ProxyEnable", proxyEnable, RegistryValueKind.DWord);
}

Answer 2

otherwise use PAC file in firefox profile.
http://findproxyforurl.com/