diff --git a/rdf/resources/sidebar.css b/rdf/resources/sidebar.css
index 40986932bd3..95160cd62fb 100644
--- a/rdf/resources/sidebar.css
+++ b/rdf/resources/sidebar.css
@@ -2,6 +2,11 @@ window {
  display: block; 
 } 
 
+#treebox {
+ width: 100%;
+ height: 100%;
+}
+
 tree { 
  display: table; 
  background-color: #eeeeee; 
@@ -33,6 +38,7 @@ treecell {
  display: table-cell;
  font-family: Verdana, Sans-Serif;
  font-size: 8pt;
+ white-space: nowrap;
 } 
 
 treehead treeitem treecell { 
diff --git a/rdf/resources/sidebar.xul b/rdf/resources/sidebar.xul
index b6b514924f1..c042c8f91af 100644
--- a/rdf/resources/sidebar.xul
+++ b/rdf/resources/sidebar.xul
@@ -84,7 +84,7 @@ function OpenURL(event,node)
 
 </html:script>
 
-<xul:tree datasources="rdf:find rdf:files rdf:ftp rdf:relatedlinks rdf:bookmarks rdf:history"  onclick="return OpenURL(event,event.target.parentNode);">
+<xul:tree flex="100%" datasources="rdf:find rdf:files rdf:ftp rdf:relatedlinks rdf:bookmarks rdf:history"  onclick="return OpenURL(event,event.target.parentNode);">
   <xul:treecol id="NameColumn" rdf:resource="http://home.netscape.com/NC-rdf#Name"/>
   <xul:treecol id="URLColumn" rdf:resource="http://home.netscape.com/NC-rdf#URL"/>
   <xul:treecol id="ShortcutURLColumn" rdf:resource="http://home.netscape.com/NC-rdf#ShortcutURL"/>
@@ -149,5 +149,4 @@ function OpenURL(event,node)
 
   </xul:treebody>
 </xul:tree>
-
 </xul:window>