gistfile1.txt

diff --git a/browser/devtools/webconsole/console-output.js b/browser/devtools/webconsole/console-output.js
--- a/browser/devtools/webconsole/console-output.js
+++ b/browser/devtools/webconsole/console-output.js
@@ -831,16 +831,17 @@ Messages.Simple.prototype = Heritage.ext
     if (this.element) {
       return this;
     }
 
     let timestamp = new Widgets.MessageTimestamp(this, this.timestamp).render();
 
     let icon = this.document.createElementNS(XHTML_NS, "span");
     icon.className = "icon";
+    icon.title = this._severityNameCompat;
 
     // Apply the current group by indenting appropriately.
     // TODO: remove this once bug 778766 is fixed.
     let indent = this._groupDepthCompat * COMPAT.GROUP_INDENT;
     let indentNode = this.document.createElementNS(XHTML_NS, "span");
     indentNode.className = "indent";
     indentNode.style.width = indent + "px";