Description of problem:
1. Launch a JNLP application from Firefox (open with "IcedTea Web Start").

Version-Release number of selected component:
icedtea-web-1.5-4.fc21

Additional info:
reporter:       libreport-2.2.3
cmdline:        java -agentpath:/usr/lib64/libabrt-java-connector.so=abrt=on -splash:/usr/share/icedtea-web/javaws_splash.png -Xbootclasspath/a:/usr/share/icedtea-web/netx.jar:/usr/share/java/tagsoup.jar -Xms8m -classpath /usr/lib/jvm/jre-openjdk/lib/rt.jar -Dicedtea-web.bin.name=javaws.itweb -Dicedtea-web.bin.location=/usr/bin/javaws.itweb net.sourceforge.jnlp.runtime.Boot /var/tmp/viewer.jnlp(REDACTED)
executable:     /usr/share/icedtea-web/netx.jar
java_executable: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.60-2.5.0.22.pre04.fc21.1.x86_64/jre-abrt/bin/java
kernel:         3.16.0-0.rc5.git1.1.fc21.x86_64
pid:            27811
runlevel:       N 5
uid:            1000

Truncated backtrace:
Exception in thread "iDRAC6 Virtual Console Client" java.lang.RuntimeException: java.lang.NoSuchMethodError: sun.security.x509.NetscapeCertTypeExtension.get(Ljava/lang/String;)Ljava/lang/Boolean;
	at net.sourceforge.jnlp.Launcher$TgThread.run(Launcher.java:934) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/Launcher$TgThread.class]
Caused by: java.lang.NoSuchMethodError: sun.security.x509.NetscapeCertTypeExtension.get(Ljava/lang/String;)Ljava/lang/Boolean;
	at net.sourceforge.jnlp.tools.JarCertVerifier.checkCertUsage(JarCertVerifier.java:578) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/tools/JarCertVerifier.class]
	at net.sourceforge.jnlp.tools.JarCertVerifier.verifyJarEntryCerts(JarCertVerifier.java:381) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/tools/JarCertVerifier.class]
	at net.sourceforge.jnlp.tools.JarCertVerifier.verifyJar(JarCertVerifier.java:293) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/tools/JarCertVerifier.class]
	at net.sourceforge.jnlp.tools.JarCertVerifier.verifyJars(JarCertVerifier.java:239) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/tools/JarCertVerifier.class]
	at net.sourceforge.jnlp.tools.JarCertVerifier.add(JarCertVerifier.java:205) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/tools/JarCertVerifier.class]
	at net.sourceforge.jnlp.runtime.JNLPClassLoader.initializeResources(JNLPClassLoader.java:644) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/runtime/JNLPClassLoader.class]
	at net.sourceforge.jnlp.runtime.JNLPClassLoader.<init>(JNLPClassLoader.java:277) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/runtime/JNLPClassLoader.class]
	at net.sourceforge.jnlp.runtime.JNLPClassLoader.createInstance(JNLPClassLoader.java:351) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/runtime/JNLPClassLoader.class]
	at net.sourceforge.jnlp.runtime.JNLPClassLoader.getInstance(JNLPClassLoader.java:418) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/runtime/JNLPClassLoader.class]
	at net.sourceforge.jnlp.runtime.JNLPClassLoader.getInstance(JNLPClassLoader.java:394) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/runtime/JNLPClassLoader.class]
	at net.sourceforge.jnlp.Launcher.createApplication(Launcher.java:781) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/Launcher.class]
	at net.sourceforge.jnlp.Launcher.launchApplication(Launcher.java:529) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/Launcher.class]
	at net.sourceforge.jnlp.Launcher$TgThread.run(Launcher.java:911) [jar:file:/usr/share/icedtea-web/netx.jar!/net/sourceforge/jnlp/Launcher$TgThread.class]