title: how to disable geckofx debug logging
body: <p>I am using the gecko web browser for a Windows form application.</p>
  
  <p>I saw you could turn off debug logging using the following lines</p>
  
  <pre><code>        System.setProperty(FirefoxDriver.SystemProperty.DRIVER_USE_MARIONETTE, "true");
          System.setProperty(FirefoxDriver.SystemProperty.BROWSER_LOGFILE, "C:\\temp\\logs.txt");
  </code></pre>
  
  <p>but I get this error
  "the type or a namespace name setproperty does not exist with the namespace "System"
  I don't know if this is the right solution because they think it is more related to selenium web driver.</p>
  
  <p>so in my trace file there is a lot of garbage from gecko, mainly
  "GetChromeFlagsAttribute called"</p>