java.lang.NullPointerException
   at java.util.zip.ZipFile.<init>(ZipFile.java:203)
   at java.util.zip.ZipFile.<init>(ZipFile.java:145)
   at java.util.zip.ZipFile.<init>(ZipFile.java:159)
   at org.netbeans.modules.extbrowser.plugins.Utils.readZip(Utils.java:229)
   at org.netbeans.modules.extbrowser.plugins.chrome.ChromeManagerAccessor$ChromeExtensionManager.getCurrentPluginVersion(ChromeManagerAccessor.java:247)
   at org.netbeans.modules.extbrowser.plugins.ExtensionManagerAccessor$AbstractBrowserExtensionManager.isUpdateRequired(ExtensionManagerAccessor.java:66)
   at org.netbeans.modules.extbrowser.plugins.chrome.ChromeManagerAccessor$ChromeExtensionManager.isInstalledImpl(ChromeManagerAccessor.java:183)
   at org.netbeans.modules.extbrowser.plugins.chrome.ChromeManagerAccessor$ChromeExtensionManager.isInstalled(ChromeManagerAccessor.java:132)
   at org.netbeans.modules.extbrowser.plugins.ExtensionManager.isInstalled(ExtensionManager.java:81)
   at org.netbeans.modules.extbrowser.chrome.ChromeBrowserImpl.setURL(ChromeBrowserImpl.java:249)
   at org.netbeans.modules.web.browser.api.WebBrowserPane$2.run(WebBrowserPane.java:221)
   at org.netbeans.modules.web.browser.api.WebBrowserPane.showURL(WebBrowserPane.java:226)
   at org.netbeans.modules.web.browser.api.BrowserSupport.load(BrowserSupport.java:196)
   at org.netbeans.modules.web.clientproject.browser.BrowserActionProvider.browseFile(BrowserActionProvider.java:196)
   at org.netbeans.modules.web.clientproject.browser.BrowserActionProvider.invokeAction(BrowserActionProvider.java:119)
   at org.netbeans.modules.web.clientproject.ClientSideProjectActionProvider.invokeAction(ClientSideProjectActionProvider.java:120)
   at org.netbeans.modules.project.ui.actions.ProjectAction$2.run(ProjectAction.java:186)
   at org.openide.util.Mutex.doEvent(Mutex.java:1343)
   at org.openide.util.Mutex.writeAccess(Mutex.java:457)
   at org.netbeans.modules.project.ui.actions.ProjectAction.runSequentially(ProjectAction.java:183)
   at org.netbeans.modules.project.ui.actions.MainProjectAction$1$1.run(MainProjectAction.java:140)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:694)
   at java.awt.EventQueue$3.run(EventQueue.java:692)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)