Bug 286949 [Browser] Bad usage of URL#equals(Object) in WebBrowserEditorInput
HEAD WebBrowserEditorInput#equals(..) calls URL#equals(Object), but the latter resolves the host of the URLs via DNS lookups, which is most of the time not what you want. You should instead compare the strings from URL#toExternalForm(). Furthermore, WebBrowserEditorInput should also override hashCode() (equal objects must have equal hash codes). Note that URL#hashCode() is also broken, so you should use URL#toExternalForm() there as well.
bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/WebBrowserEditorInput.java
}
	/*
	 * Returns whether the editor input exists.
	 */
	public boolean exists() {
		if ((style & IWorkbenchBrowserSupport.PERSISTENT) != 0)
			return false;
		return true;
	}
	/**
	 * Returns an object which is an instance of the given class associated with
	 * this object. Returns <code>null</code> if no such object can be found.
	 * 
	 * @param adapter
	 *            the adapter class to look up
	 * @return a object castable to the given class, or <code>null</code> if
	 *         this object does not have an adapter for the given class
	 */
	public Object getAdapter(Class adapter) {
		return null;
	}
	/**
	 * Returns the ID of an element factory which can be used to recreate this
	 * object. An element factory extension with this ID must exist within the
	 * workbench registry.
	 * 
	 * @return the element factory ID
	 */
	public String getFactoryId() {
		return ELEMENT_FACTORY_ID;