Description Bianca Jiang 2006-03-22 15:09:52 EST

Looks like the cache for browser instances is cleared right after the browser opens.  The clearance is in the Observer:
public DefaultBrowserSupport() {
  // do nothing
  instance = this;
  BrowserManager.getInstance().addObserver(new Observer() {
	public void update(Observable o, Object arg) {
	  // TODO I am not sure what we should do here
	  // The preferences have changed so maybe we should
	  // close the opened browsers in addition to clearing
	  // the table
		browserIdMap.clear();
	}
  });
}

Call stack when clear() is called:
Thread [main] (Suspended (breakpoint at line 43 in DefaultBrowserSupport$1))
	DefaultBrowserSupport$1.update(Observable, Object) line: 43
	BrowserManager(Observable).notifyObservers(Object) line: not available
	BrowserManager(Observable).notifyObservers() line: not available
	BrowserManager$1.propertyChange(Preferences$PropertyChangeEvent) line: 51
	Preferences$1.run() line: 505
	SafeRunner.run(ISafeRunnable) line: 37
	PreferenceForwarder(Preferences).firePropertyChangeEvent(String, Object, Object) line: 508
	PreferenceForwarder.preferenceChange(IEclipsePreferences$PreferenceChangeEvent) line: 119
	EclipsePreferences$2.run() line: 746
	SafeRunner.run(ISafeRunnable) line: 37
	InstancePreferences(EclipsePreferences).firePreferenceEvent(String, Object, Object) line: 749
	InstancePreferences(EclipsePreferences).put(String, String) line: 762
	ScopedPreferenceStore.setValue(String, String) line: 748
	WebBrowserPreference.setInternalWebBrowserHistory(List) line: 90
	BrowserViewer.addToHistory(String) line: 687
	BrowserViewer.setURL(String, boolean) line: 662
	BrowserViewer.setURL(String) line: 287
	WebBrowserEditor.createPartControl(Composite) line: 80
	EditorReference.createPartHelper() line: 591
	EditorReference.createPart() line: 367
	EditorReference(WorkbenchPartReference).getPart(boolean) line: 555
	EditorReference.getEditor(boolean) line: 212
	WorkbenchPage.busyOpenEditorBatched(IEditorInput, String, boolean, int) line: 2392
	WorkbenchPage.busyOpenEditor(IEditorInput, String, boolean, int) line: 2325
	WorkbenchPage.access$10(WorkbenchPage, IEditorInput, String, boolean, int) line: 2317
	WorkbenchPage$9.run() line: 2303
	BusyIndicator.showWhile(Display, Runnable) line: 69