Crash immediately after bootstrap on Android

On Android, when bootstrapping completes we call an onFinish method. Unfortunately, in this method we assume a tab was already created. Apparently this is a bad assumption and the app crashes.

java.lang.NullPointerException:
  at org.mozilla.gecko.BrowserApp$34.onFinish (BrowserApp.java:3021)
  at org.mozilla.gecko.torbootstrap.TorBootstrapAnimationContainer.hide (TorBootstrapAnimationContainer.java:61)
  at org.mozilla.gecko.torbootstrap.TorBootstrapAnimationContainer$1.onFinish (TorBootstrapAnimationContainer.java:53)
  at org.mozilla.gecko.torbootstrap.TorBootstrapPager$1.finish (TorBootstrapPager.java:64)
  at org.mozilla.gecko.firstrun.FirstrunPanel.close (FirstrunPanel.java:83)
  at org.mozilla.gecko.torbootstrap.TorBootstrapPanel.updateStatus (TorBootstrapPanel.java:365)
  at org.mozilla.gecko.torbootstrap.TorLogEventListener$2.handleMessage (TorLogEventListener.java:123)
  at android.os.Handler.dispatchMessage (Handler.java:106)
  at android.os.Looper.loop (Looper.java:216)
  at android.app.ActivityThread.main (ActivityThread.java:7188)
  at java.lang.reflect.Method.invoke (Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:494)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:975)