Add Bugzilla to 'ln'.

common/locale/en-US/options.xml

@@ -1060,6 +1060,7 @@
           mxr.mozilla.org:a.l,
           pastebin.com:#code_frame>div>ol>li,
           addons.mozilla.org:.gutter>.line>a,
+          bugzilla.mozilla.org:.bz_comment:not(.bz_first_comment):not(.ih_history),
           *:'/* Hgweb/Gitweb */ .completecodeline a.codeline, a.linenr']]></default>
     <description>
         <p>