java.lang.NullPointerException
   at java.lang.String.startsWith(String.java:1385)
   at java.lang.String.startsWith(String.java:1414)
   at org.netbeans.modules.web.browser.api.WebBrowser.fromBrowserURL(WebBrowser.java:219)
   at org.netbeans.modules.web.clientproject.ServerURLMappingImpl.fromServer(ServerURLMappingImpl.java:118)
   at org.netbeans.modules.web.common.api.ServerURLMapping.fromServer(ServerURLMapping.java:147)
   at org.netbeans.modules.web.common.api.ServerURLMapping.fromServer(ServerURLMapping.java:132)
   at org.netbeans.modules.web.inspect.ui.Utilities.inspectedFileObject(Utilities.java:125)
   at org.netbeans.modules.web.inspect.ui.CssStylesPanelProviderImpl.update(CssStylesPanelProviderImpl.java:370)
   at org.netbeans.modules.web.inspect.ui.CssStylesPanelProviderImpl.access$300(CssStylesPanelProviderImpl.java:101)
   at org.netbeans.modules.web.inspect.ui.CssStylesPanelProviderImpl$4.propertyChange(CssStylesPanelProviderImpl.java:340)
   at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
   at org.netbeans.modules.web.inspect.PageInspectorImpl.firePropertyChange(PageInspectorImpl.java:341)
   at org.netbeans.modules.web.inspect.PageInspectorImpl.inspectPage(PageInspectorImpl.java:189)
   at org.netbeans.modules.extbrowser.plugins.ExternalBrowserPlugin$BrowserTabDescriptor.init(ExternalBrowserPlugin.java:860)
   at org.netbeans.modules.extbrowser.plugins.ExternalBrowserPlugin$BrowserTabDescriptor.access$300(ExternalBrowserPlugin.java:723)
   at org.netbeans.modules.extbrowser.plugins.ExternalBrowserPlugin$2.run(ExternalBrowserPlugin.java:166)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:419)
   at org.netbeans.modules.extbrowser.plugins.ExternalBrowserPlugin.showURLInTab(ExternalBrowserPlugin.java:163)
   at org.netbeans.modules.extbrowser.plugins.ExternalBrowserPlugin$BrowserPluginHandler.handleInit(ExternalBrowserPlugin.java:386)
   at org.netbeans.modules.extbrowser.plugins.ExternalBrowserPlugin$BrowserPluginHandler.read(ExternalBrowserPlugin.java:312)
   at org.netbeans.modules.netserver.websocket.WebSocketHandler7.readDelegate(WebSocketHandler7.java:118)
   at org.netbeans.modules.netserver.websocket.AbstractWSHandler7.readData(AbstractWSHandler7.java:301)
   at org.netbeans.modules.netserver.websocket.AbstractWSHandler7.readFinalFrame(AbstractWSHandler7.java:263)
   at org.netbeans.modules.netserver.websocket.AbstractWSHandler7.read(AbstractWSHandler7.java:126)
   at org.netbeans.modules.netserver.websocket.WebSocketServerImpl$WebSocketHandler.read(WebSocketServerImpl.java:207)
   at org.netbeans.modules.netserver.SocketFramework.readData(SocketFramework.java:179)
   at org.netbeans.modules.netserver.SocketFramework.process(SocketFramework.java:153)
   at org.netbeans.modules.netserver.SocketServer.process(SocketServer.java:106)
   at org.netbeans.modules.netserver.SocketFramework.doRun(SocketFramework.java:137)
   at org.netbeans.modules.netserver.SocketServer.run(SocketServer.java:77)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)