Setup proxy in Firefox browser via marionette driver

The old tricks with firefoxProfile or Proxy class do not work any more. All you have to do is pass through requiredCapabilities a JSON with the new Marionette proxy format:

[{proxy={"proxyType":"MANUAL","httpProxy":"host.proxy","httpProxyPort":80,"sslProxy":"host.proxy","sslProxyPort":80}}]

No more "proxyHost:proxyPort" format, but httpProxy=host, httpProxyPort=port.

JsonObject json = new JsonObject();json.addProperty("proxyType", "MANUAL");json.addProperty("httpProxy", aHost);json.addProperty("httpProxyPort", aPort);json.addProperty("sslProxy", aHost);json.addProperty("sslProxyPort", aPort);required.setCapability("proxy", json);driver = new FirefoxDriver(service, cap, required);

Here is all the code:

 import java.io.File;

import java.io.IOException;

import org.apache.commons.lang.SystemUtils;import org.openqa.selenium.WebDriver;import org.openqa.selenium.firefox.FirefoxBinary;import org.openqa.selenium.firefox.FirefoxDriver;import org.openqa.selenium.firefox.GeckoDriverService;import org.openqa.selenium.remote.DesiredCapabilities;import com.google.common.collect.ImmutableMap;import com.google.gson.JsonObject;public class TestProxy{  public static void main(String[] args)  {     if (args.length == 0)    {      System.out.println("usage: IP port");      System.exit(-1);    }    String proxyServer = args[0];    int proxyPort = Integer.parseInt(args[1]);    try    {      TestProxy test = new TestProxy();      test.TestDriver(proxyServer, proxyPort);    } catch (IOException e)    {      e.printStackTrace();    }      }  private void TestDriver(String aHost, int aPort) throws IOException  {    WebDriver driver = null;    GeckoDriverService service = null;    if (SystemUtils.IS_OS_LINUX)    {      FirefoxBinary firefoxBinary = new FirefoxBinary(new File("/home/ubuntu/firefox/firefox"));      service = new GeckoDriverService.Builder(firefoxBinary)          .usingDriverExecutable(new File("/usr/bin/geckodriver"))          .usingAnyFreePort()          .usingAnyFreePort()          .withEnvironment(ImmutableMap.of("DISPLAY",":20"))          .build();      service.start();          }    else if (SystemUtils.IS_OS_WINDOWS)    {      FirefoxBinary firefoxBinary = new FirefoxBinary(new File("C:\\Program Files\\Mozilla Firefox\\firefox.exe"));      service = new GeckoDriverService.Builder(firefoxBinary)          .usingDriverExecutable(new File("C:\\Windows\\geckodriver.exe"))          .usingAnyFreePort()          .usingAnyFreePort()          .build();      service.start();          }    else    {      System.out.println("Unknown operation system");      System.exit(-1);    }    DesiredCapabilities cap = DesiredCapabilities.firefox();    DesiredCapabilities required = new DesiredCapabilities();    JsonObject json = new JsonObject();    json.addProperty("proxyType", "MANUAL");    json.addProperty("httpProxy", aHost);    json.addProperty("httpProxyPort", aPort);    json.addProperty("sslProxy", aHost);    json.addProperty("sslProxyPort", aPort);    required.setCapability("proxy", json);    driver = new FirefoxDriver(service, cap, required);    driver.navigate().to("https://api.ipify.org/?format=text");    System.out.println(driver.getPageSource());    driver.quit();  }}

https://github.com/SeleniumHQ/selenium/issues/2963

https://github.com/mozilla/geckodriver/issues/97#issuecomment-255386464