diff --git a/common/content/completion.js b/common/content/completion.js
index 5dc83621..ae025167 100644
--- a/common/content/completion.js
+++ b/common/content/completion.js
@@ -1289,6 +1289,20 @@ const Completion = Module("completion", {
     }, {
         EVAL_TMP: "__liberator_eval_tmp"
     })
+}, {
+    options: function () {
+        options.add(["jsdebugger", "jsd"],
+            "Switch on/off jsdebugger",
+            "boolean", false, {
+                setter: function(value) {
+                    if (value)
+                        services.get("debugger").on();
+                    else
+                        services.get("debugger").off();
+                },
+                getter: function () services.get("debugger").isOn
+            });
+    },
 });
 
 // vim: set fdm=marker sw=4 ts=4 et:
diff --git a/common/locale/en-US/options.xml b/common/locale/en-US/options.xml
index 05be799f..eefd2fe7 100644
--- a/common/locale/en-US/options.xml
+++ b/common/locale/en-US/options.xml
@@ -1347,5 +1347,18 @@
     </description>
 </item>
 
+<item>
+    <tags>'jsd' 'jsdebugger'</tags>
+    <spec>'jsdebugger' 'jsd'</spec>
+    <type>boolean</type>
+    <default>off</default>
+    <description>
+        <p>
+            Use javascript debugger service at the completion list.
+            More list is shown up when it is on.
+        </p>
+    </description>
+</item>
+
 </document>
 <!-- vim:se sts=4 sw=4 et: -->
diff --git a/muttator/NEWS b/muttator/NEWS
index 2a8710c8..657e2ddd 100644
--- a/muttator/NEWS
+++ b/muttator/NEWS
@@ -7,6 +7,7 @@
     * add the *DOMLoad* autocommand event
     * add 'online' option
     * add 'smtpserver' option
+	* add 'jsdebugger' option - switch on/off javascript debugger service
 
 2009-03-29
     * version 0.5
diff --git a/vimperator/NEWS b/vimperator/NEWS
index ff97164b..1e203473 100644
--- a/vimperator/NEWS
+++ b/vimperator/NEWS
@@ -5,6 +5,7 @@
     * asciidoc is no longer required to build Vimperator
     * the help system is newly modularized
     * remove [c]:edit[c], [c]:tabedit[c], and [c]:winedit[c]
+	* add 'jsdebugger' option - switch on/off javascript debugger service
 
 2009-10-28:
     * version 2.2
diff --git a/xulmus/NEWS b/xulmus/NEWS
index bfa4abfb..2286e2fe 100644
--- a/xulmus/NEWS
+++ b/xulmus/NEWS
@@ -12,6 +12,7 @@
     * add [c]:displaypane[c] and [c]:dpclose[c]
     * rename [c]:filter[c] to [c]:queue[c] and [c]:Filter[c] to [c]:filter[c]
     * add 'repeat' and 'shuffle'
+	* add 'jsdebugger' option - switch on/off javascript debugger service
 
 2009-03-28:
     * version 0.1