title: INFO: HTTP Status: '404' -> incorrect JSON status mapping for 'unknown error' with GeckoDriver, Firefox and Selenium through Java
body: <p>when I run selenium WebDriver driver = new FirefoxDriver () shows error, it imports all the libraries it requires but it still reproduces the error   </p>
  
  <pre><code> package prueba;
  
      import org.openqa.selenium.WebDriver;
  
      import org.openqa.selenium.firefox.FirefoxDriver;
  
      public class Prueba {
  
          public static void main(String[] args) {
          WebDriver driver= new FirefoxDriver();
          driver.get("https://www.google.com/");
      }
  
  }
  </code></pre>
  
  <p>when I run with Firefox driver () it shows the following error</p>
  
  <pre><code>1541445238209   Marionette  DEBUG   Remote service is active
  1541445238216   Marionette  DEBUG   Accepted connection 0 from 127.0.0.1:51066
  1541445238238   Marionette  TRACE   0 -&gt; [0,1,"newSession",{"acceptInsecureCerts":true,"browserName":"firefox","capabilities":{"desiredCapabilities":{"acceptInsecureCerts":true,"browserName":"firefox"}}}]
  1541445238238   Marionette  TRACE   0 &lt;- [1,1,{"error":"unknown command","message":"newSession","stacktrace":"WebDriverError@chrome://marionette/content/error.js:178: ... et@chrome://marionette/content/server.js:245:8\n_onJSONObjectReady/&lt;@chrome://marionette/content/transport.js:490:9\n"},null]
  Nov 05, 2018 3:13:58 PM org.openqa.selenium.remote.ErrorCodes toStatus
  INFO: HTTP Status: '404' -&gt; incorrect JSON status mapping for 'unknown error' (500 expected)
  Exception in thread "main" org.openqa.selenium.WebDriverException: newSession
  Build info: version: '3.8.1', revision: '6e95a6684b', time: '2017-12-01T19:05:14.666Z'
  System info: host: 'Mac-mini-QE-Gustavo.local', ip: '192.168.1.73', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.13.6', java.version: '1.8.0_131'
  Driver info: driver.version: FirefoxDriver
  remote stacktrace: stack backtrace:
     0:        0x10a952f64 - backtrace::backtrace::trace::h381bd5461b44fdf8
     1:        0x10a95331e - backtrace::capture::Backtrace::new::hbc1a12654c8fdba8
     2:        0x10a87f2ad - webdriver::error::WebDriverError::new::h482125abced50b28
     3:        0x10a88b11f - geckodriver::marionette::MarionetteSession::response::hc90b9b3424fb8183
     4:        0x10a89828b - geckodriver::marionette::MarionetteConnection::send_command::he82b7344fb11a670
     5:        0x10a889d38 - _$LT$geckodriver..marionette..MarionetteHandler$u20$as$u20$webdriver..server..WebDriverHandler$LT$geckodriver..marionette..GeckoExtensionRoute$GT$$GT$::handle_command::hf2128d0e5b79de64
     6:        0x10a829be8 - _$LT$webdriver..server..Dispatcher$LT$T$C$$u20$U$GT$$GT$::run::h03cbe31ad3bffc79
     7:        0x10a88004a - webdriver::server::start::_$u7b$$u7b$closure$u7d$$u7d$::h39b3aa32dda07c86
     8:        0x10a87434a - _$LT$std..panic..AssertUnwindSafe$LT$F$GT$$u20$as$u20$core..ops..FnOnce$LT$$LP$$RP$$GT$$GT$::call_once::hdf61d260d4895572
     9:        0x10a7b8399 - std::panicking::try::do_call::h7b2d8948e219fc68
    10:        0x10ade901a - __rust_maybe_catch_panic
    11:        0x10a7b7eac - std::panicking::try::h91913aec898bbfef
    12:        0x10a7b53c5 - std::panic::catch_unwind::h3ab5cba0644d3617
    13:        0x10a7b717c - std::thread::Builder::spawn::_$u7b$$u7b$closure$u7d$$u7d$::h27cd13f9efbf7439
    14:        0x10a812686 - _$LT$F$u20$as$u20$alloc..boxed..FnBox$LT$A$GT$$GT$::call_box::hc399e39818c3f4d8
    15:        0x10ade51e4 - std::sys::imp::thread::Thread::new::thread_start::h36f6d218784ec55f
    16:     0x7fff58dfa660 - _pthread_body
    17:     0x7fff58dfa50c - _pthread_start
      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
      at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
      at (RemoteWebDriver.java:142)
      at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:120)
      at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:98)
      at prueba.Prueba.main(Prueba.java:23)
  /Users/macminidev2/Library/Caches/NetBeans/8.2/executor-snippets/run.xml:53: Java returned: 1
  BUILD FAILED (total time: 4 seconds)
  </code></pre>
  
  <p>could you help me with this problem please :D</p>