java.lang.NullPointerException
   at java.util.zip.ZipFile.<init>(ZipFile.java:208)
   at java.util.zip.ZipFile.<init>(ZipFile.java:150)
   at java.util.zip.ZipFile.<init>(ZipFile.java:164)
   at org.netbeans.modules.extbrowser.plugins.Utils.readZip(Utils.java:229)
   at org.netbeans.modules.extbrowser.plugins.chrome.ChromeManagerAccessor$ChromeExtensionManager.getCurrentPluginVersion(ChromeManagerAccessor.java:251)
   at org.netbeans.modules.extbrowser.plugins.ExtensionManagerAccessor$AbstractBrowserExtensionManager.isUpdateRequired(ExtensionManagerAccessor.java:66)
   at org.netbeans.modules.extbrowser.plugins.chrome.ChromeManagerAccessor$ChromeExtensionManager.isInstalledImpl(ChromeManagerAccessor.java:187)
   at org.netbeans.modules.extbrowser.plugins.chrome.ChromeManagerAccessor$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:259)
   at org.netbeans.modules.web.browser.api.WebBrowserPane$2.run(WebBrowserPane.java:229)
   at org.netbeans.modules.web.browser.api.WebBrowserPane.showURL(WebBrowserPane.java:235)
   at org.netbeans.modules.web.browser.api.BrowserSupport.load(BrowserSupport.java:197)
   at org.netbeans.modules.web.clientproject.browser.BrowserActionProvider.browseFile(BrowserActionProvider.java:142)
   at org.netbeans.modules.web.clientproject.browser.BrowserActionProvider.invokeAction(BrowserActionProvider.java:113)
   at org.netbeans.modules.web.clientproject.ClientSideProjectActionProvider.invokeAction(ClientSideProjectActionProvider.java:127)
   at org.netbeans.modules.project.ui.actions.ProjectAction$2.run(ProjectAction.java:186)
   at org.openide.util.Mutex.doEvent(Mutex.java:1356)
   at org.openide.util.Mutex.writeAccess(Mutex.java:462)
   at org.netbeans.modules.project.ui.actions.ProjectAction.runSequentially(ProjectAction.java:183)
   at org.netbeans.modules.project.ui.actions.ProjectAction$1$1.run(ProjectAction.java:139)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)