Bug 131989 - [Browser] NullPointerException in WorkbenchBrowserSupport.createBrowser
diff --git a/bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/DefaultBrowserSupport.java b/bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/DefaultBrowserSupport.java
index 8c7b9dc..a4482e9 100644
--- a/bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/DefaultBrowserSupport.java
+++ b/bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/DefaultBrowserSupport.java
@@ -26,6 +26,7 @@
  */
 public class DefaultBrowserSupport extends AbstractWorkbenchBrowserSupport {
 	static final String SHARED_ID = "org.eclipse.ui.browser"; //$NON-NLS-1$
+	static final String DEFAULT_ID_BASE = "org.eclipse.ui.defaultBrowser"; //$NON-NLS-1$
 
 	protected HashMap browserIdMap = new HashMap();
 
@@ -84,7 +85,7 @@
 	public IWebBrowser createBrowser(int style, String browserId, String name,
 			String tooltip) throws PartInitException {
 		if (browserId == null)
-			browserId = SHARED_ID;
+			browserId = getDefaultId();
 		IWebBrowser browser = getExistingWebBrowser(browserId);
 		if (browser != null) {
 			if (browser instanceof InternalBrowserInstance) {
@@ -181,4 +182,14 @@
 		} else
 			browserIdMap.remove(baseId);
 	}
+	
+	private String getDefaultId() {
+		String id = null;
+		for (int i = 0; i < Integer.MAX_VALUE; i++) {
+			id = DEFAULT_ID_BASE + i;
+			if (browserIdMap.get(id) == null)
+				break;
+		}
+		return id;
+	}
 }
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