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java.lang.ClassCastException: java.util.HashMap cannot be cast to java.lang.String	at org.openqa.selenium.firefox.FirefoxDriver.getBinary(FirefoxDriver.java:200)	at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:128)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)	at org.openqa.selenium.remote.server.FirefoxDriverProvider.callConstructor(FirefoxDriverProvider.java:91)	at org.openqa.selenium.remote.server.FirefoxDriverProvider.newInstance(FirefoxDriverProvider.java:68)	at org.openqa.selenium.remote.server.DefaultDriverFactory.newInstance(DefaultDriverFactory.java:60)	at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call(DefaultSession.java:222)	at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call(DefaultSession.java:1)	at java.util.concurrent.FutureTask.run(FutureTask.java:262)	at org.openqa.selenium.remote.server.DefaultSession$1.run(DefaultSession.java:176)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:745)