When a JFR file is dragged and dropped in JMC, it throws exception in the terminal where it was started:

Jun 26, 2018 5:27:04 AM org.openjdk.jmc.flightrecorder.ui.overview.ResultOverview redisplay
WARNING: Could not create browser, using SWT table for fallback
org.eclipse.swt.SWTError: No more handles because no underlying browser available.
   SWT on GTK 2.x detected. It is reccomended to use SWT on GTK 3.x and Webkit2 API.

        at org.eclipse.swt.SWT.error(SWT.java:4578)
        at org.eclipse.swt.browser.Browser.<init>(Browser.java:125)
        at org.openjdk.jmc.flightrecorder.ui.overview.ResultOverview.redisplay(ResultOverview.java:274)
        at org.openjdk.jmc.flightrecorder.ui.overview.ResultOverview.display(ResultOverview.java:241)
        at org.openjdk.jmc.flightrecorder.ui.JfrEditor.displayPage(JfrEditor.java:234)
        at org.openjdk.jmc.flightrecorder.ui.JfrEditor.navigateTo(JfrEditor.java:218)
        at org.openjdk.jmc.flightrecorder.ui.JfrEditor.refreshPages(JfrEditor.java:292)
        at org.openjdk.jmc.flightrecorder.ui.JfrEditor.repositoryLoaded(JfrEditor.java:385)
        at org.openjdk.jmc.flightrecorder.ui.RecordingLoader$1.run(RecordingLoader.java:157)
        at org.openjdk.jmc.ui.misc.DisplayToolkit$SafeRunnable.run(DisplayToolkit.java:61)
        at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:37)
        at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
        at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4915)
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4521)
        at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1170)
        at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
        at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1059)
        at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
        at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:667)
        at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
        at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:597)
        at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
        at org.openjdk.jmc.rcp.application.Application.start(Application.java:64)
        at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:656)
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:592)
        at org.eclipse.equinox.launcher.Main.run(Main.java:1498)
        at org.eclipse.equinox.launcher.Main.main(Main.java:1471)