Bug 293159 [Browser] Search for external browser in Preferences finds > 40 instances of firefox on Ubuntu 64bit, if started in /usr/bin
bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/WebBrowserPreferencePage.java
public Object[] getElements(Object inputElement) {
			List list = new ArrayList();
			Iterator iterator = BrowserManager.getInstance().getWebBrowsers()
					.iterator();
			while (iterator.hasNext()) {
				IBrowserDescriptor browser = (IBrowserDescriptor) iterator
						.next();
				list.add(browser);
			}
			return list.toArray();
		}
		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
			
		}
		public void dispose() {
			
		}
	}
	class BrowserTableLabelProvider implements ITableLabelProvider {