Removes the firefox issue link.

unsupported_browser.html

@@ -34,7 +34,7 @@
         </div>
     </div>
     <div class="clear"></div>
-    <div class="firefox">We are hoping that <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=977864">multistream support</a> for Firefox would not be long so that we could all use this application with our favorite browser.</div>
+    <div class="firefox">We are hoping that multistream support for Firefox would not be long so that we could all use this application with our favorite browser.</div>
 </div>
 <!-- wrap ends here -->
 </div>