diff --git a/RecentActivity/src/org/sleuthkit/autopsy/recentactivity/Firefox.java b/RecentActivity/src/org/sleuthkit/autopsy/recentactivity/Firefox.java
index b558cc9a26..70ad839baa 100644
--- a/RecentActivity/src/org/sleuthkit/autopsy/recentactivity/Firefox.java
+++ b/RecentActivity/src/org/sleuthkit/autopsy/recentactivity/Firefox.java
@@ -200,7 +200,10 @@ public class Firefox extends Extract {
                 Collection<BlackboardAttribute> bbattributes = new ArrayList<BlackboardAttribute>();
                 bbattributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_URL.getTypeID(), "RecentActivity", ((result.get("url").toString() != null) ? result.get("url").toString() : "")));
                 bbattributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_NAME.getTypeID(), "RecentActivity", ((result.get("title").toString() != null) ? result.get("title").toString() : "")));
-                bbattributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_DATETIME_ACCESSED.getTypeID(), "RecentActivity", (Long.valueOf(result.get("dateAdded").toString()))));
+                long time = Long.valueOf(result.get("dateAdded").toString());
+                if (time > 0) {
+                    bbattributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_DATETIME_ACCESSED.getTypeID(), "RecentActivity", Long.valueOf(result.get("dateAdded").toString())));
+                }
                 bbattributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_PROG_NAME.getTypeID(), "RecentActivity", "FireFox"));
                 bbattributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_DOMAIN.getTypeID(), "RecentActivity", (Util.extractDomain((result.get("url").toString() != null) ? result.get("url").toString() : ""))));
                 this.addArtifact(ARTIFACT_TYPE.TSK_WEB_BOOKMARK, bookmarkFile, bbattributes);