diff --git a/common/content/configbase.js b/common/content/configbase.js
index 18387102..f8d4ea34 100644
--- a/common/content/configbase.js
+++ b/common/content/configbase.js
@@ -80,15 +80,21 @@ const ConfigBase = Class(ModuleBase, {
      */
     features: [],
 
+    /**
+     * @property {string} The file extension used for command script files.
+     *     This is the name string sans "dactyl".
+     */
+    get fileExtension() this.name.slice(0, -6),
+
     guioptions: {},
 
     hasTabbrowser: false,
 
     /**
      * @property {string} The name of the application that hosts the
-     *     “liberated” application. E.g., "Firefox" or "Xulrunner".
+     *     extension. E.g., "Firefox" or "XULRunner".
      */
-    hostApplication: null,
+    host: null,
 
     /**
      * @property {Object} A map between key names for key events should be ignored,
@@ -109,7 +115,7 @@ const ConfigBase = Class(ModuleBase, {
     modes: [],
 
     /**
-     * @property {string} The name of “liberated” application.
+     * @property {string} The name of the extension.
      *    Required.
      */
     name: null,
diff --git a/common/content/dactyl.js b/common/content/dactyl.js
index c830cc20..bb0b12e2 100644
--- a/common/content/dactyl.js
+++ b/common/content/dactyl.js
@@ -721,12 +721,12 @@ const Dactyl = Module("dactyl", {
             return;
         }
 
-        dactyl.echomsg('Searching for "plugins/**/*.{js,vimp}" in '
+        dactyl.echomsg('Searching for "plugins/**/*.{js,' + config.fileExtension + '}" in '
                             + [dir.path.replace(/.plugins$/, "") for ([, dir] in Iterator(dirs))]
                                 .join(",").quote(), 2);
 
         dirs.forEach(function (dir) {
-            dactyl.echomsg("Searching for " + (dir.path + "/**/*.{js,vimp}").quote(), 3);
+            dactyl.echomsg("Searching for " + (dir.path + "/**/*.{js," + config.fileExtension + "}").quote(), 3);
             sourceDirectory(dir);
         });
     },
@@ -1238,7 +1238,7 @@ const Dactyl = Module("dactyl", {
 
         options.add(["loadplugins", "lpl"],
             "A regex list that defines which plugins are loaded at startup and via :loadplugins",
-            "regexlist", "'\\.(js|vimp)$'");
+            "regexlist", "'\\.(js|" + config.fileExtension + ")$'");
 
         options.add(["titlestring"],
             "Change the title of the window",
diff --git a/common/content/events.js b/common/content/events.js
index d4ae92fa..bcbddf53 100644
--- a/common/content/events.js
+++ b/common/content/events.js
@@ -86,8 +86,8 @@ const Events = Module("events", {
 
                         for (let file in dir.iterDirectory()) {
                             if (file.exists() && !file.isDirectory() && file.isReadable() &&
-                                /^[\w_-]+(\.vimp)?$/i.test(file.leafName)) {
-                                let name = file.leafName.replace(/\.vimp$/i, "");
+                                RegExp("^[\\w_-]+(\\." + config.fileExtension + ")?$", "i").test(file.leafName)) {
+                                let name = file.leafName.replace(RegExp("\\." + config.fileExtension + "$", "i"), "");
                                 this._macros.set(name, {
                                     keys: file.read().split("\n")[0],
                                     timeRecorded: file.lastModifiedTime
diff --git a/common/locale/en-US/options.xml b/common/locale/en-US/options.xml
index 5f433c82..b9c85c4b 100644
--- a/common/locale/en-US/options.xml
+++ b/common/locale/en-US/options.xml
@@ -918,7 +918,7 @@
     <tags>'noloadplugins' 'loadplugins'</tags>
     <spec>'loadplugins' 'lpl'</spec>
     <type>regexlist</type>
-    <default>\.(js|vimp)$</default>
+    <default>\.(js|&dactyl.fileExt;)$</default>
     <description>
         <p>
             A regular expression list that defines which plugins are loaded at
@@ -937,7 +937,7 @@
             omit in your <tt><t>&dactyl.name;rc</t></tt> using something like
             the below:
         </p>
-        <code><ex>:set loadplugins=</ex>!<str delim="'">foo|bar</str>,<str delim="'">\.(js|vimp)$</str></code>
+        <code><ex>:set loadplugins=</ex>!<str delim="'">foo|bar</str>,<str delim="'">\.(js|&dactyl.fileExt;)$</str></code>
         <p>
             That will load all plugins but <em>foo</em> and <em>bar</em>.
         </p>
diff --git a/common/locale/en-US/starting.xml b/common/locale/en-US/starting.xml
index 73761785..f99bdf20 100644
--- a/common/locale/en-US/starting.xml
+++ b/common/locale/en-US/starting.xml
@@ -112,9 +112,9 @@
         <p>
             All directories in <o>runtimepath</o> are searched for a
             ‘plugins’ subdirectory and all yet unloaded plugins are loaded.
-            For each plugins directory, all <tt>*.{js,vimp}</tt> files (including
-            those in further subdirectories) are sourced alphabetically. No
-            plugins will be sourced if,
+            For each plugins directory, all <tt>*.{js,&dactyl.fileExt;}</tt>
+            files (including those in further subdirectories) are sourced
+            alphabetically. No plugins will be sourced if,
         </p>
 
         <ul>
diff --git a/common/locale/en-US/styling.xml b/common/locale/en-US/styling.xml
index c5e1a04a..40805532 100644
--- a/common/locale/en-US/styling.xml
+++ b/common/locale/en-US/styling.xml
@@ -25,7 +25,7 @@
     <description>
         <p>
             Load a color scheme. <a>name</a> is found by searching the <o>runtimepath</o> for the
-            first file matching <tt>colors/<a>name</a>.vimp</tt>.
+            first file matching <tt>colors/<a>name</a>.&dactyl.fileExt;</tt>.
         </p>
 
         <p>
diff --git a/common/modules/highlight.jsm b/common/modules/highlight.jsm
index e500e7b9..82f0a1b4 100644
--- a/common/modules/highlight.jsm
+++ b/common/modules/highlight.jsm
@@ -238,7 +238,7 @@ const Highlights = Module("Highlight", {
                 if (scheme == "default")
                     highlight.clear();
                 else
-                    dactyl.assert(modules.io.sourceFromRuntimePath(["colors/" + scheme + ".vimp"]),
+                    dactyl.assert(modules.io.sourceFromRuntimePath(["colors/" + scheme + "." + modules.config.fileExtension]),
                         "E185: Cannot find color scheme " + scheme);
                 modules.autocommands.trigger("ColorScheme", { name: scheme });
             },
@@ -313,13 +313,14 @@ const Highlights = Module("Highlight", {
     },
     completion: function (dactyl, modules) {
         const completion = modules.completion;
+        const config = modules.config;
         completion.colorScheme = function colorScheme(context) {
             context.title = ["Color Scheme", "Runtime Path"];
-            context.keys = { text: function (f) f.leafName.replace(/\.vimp$/, ""), description: ".parent.path" };
+            context.keys = { text: function (f) f.leafName.replace(RegExp("\\." + config.fileExtension + "$"), ""), description: ".parent.path" };
             context.completions = array.flatten(
                 modules.io.getRuntimeDirectories("colors").map(
                     function (dir) dir.readDirectory().filter(
-                        function (file) /\.vimp$/.test(file.leafName))));
+                        function (file) RegExp("\\." + config.fileExtension + "$").test(file.leafName))));
 
         };
 
diff --git a/pentadactyl/NEWS b/pentadactyl/NEWS
index 44e5e1e6..72b48421 100644
--- a/pentadactyl/NEWS
+++ b/pentadactyl/NEWS
@@ -18,6 +18,7 @@
       - Backtracks to the first successful match after pressing
         backspace.
       - Supports reverse incremental search.
+    * Command script files now use the *.penta file extension.
     * Multiple Ex commands may now be separated by |
     * Command-line is now hidden by default. Added C and M to
       'guioptions'.
diff --git a/pentadactyl/content/dactyl.dtd b/pentadactyl/content/dactyl.dtd
index 8220a0f7..91bf6a0c 100644
--- a/pentadactyl/content/dactyl.dtd
+++ b/pentadactyl/content/dactyl.dtd
@@ -13,6 +13,7 @@
 <!ENTITY dactyl.maillist "pentadactyl@googlegroups.com">
 <!ENTITY dactyl.host "&brandShortName;">
 <!ENTITY dactyl.hostbin "firefox">
+<!ENTITY dactyl.fileExt "penta">
 <!ENTITY dactyl.statusBefore "statusbar-display">
 <!ENTITY dactyl.statusAfter "">
 
diff --git a/teledactyl/content/dactyl.dtd b/teledactyl/content/dactyl.dtd
index 4afd960d..afcfd48c 100644
--- a/teledactyl/content/dactyl.dtd
+++ b/teledactyl/content/dactyl.dtd
@@ -8,6 +8,7 @@
 <!ENTITY dactyl.appName "Teledactyl">
 <!ENTITY dactyl.host "&brandShortName;">
 <!ENTITY dactyl.hostbin "thunderbird">
+<!ENTITY dactyl.fileExt "tele">
 <!ENTITY dactyl.statusBefore "">
 <!ENTITY dactyl.statusAfter "statusTextBox">
 
diff --git a/xulmus/content/config.js b/xulmus/content/config.js
index eae72d82..1dedb03b 100644
--- a/xulmus/content/config.js
+++ b/xulmus/content/config.js
@@ -24,7 +24,7 @@ const Config = Module("config", ConfigBase, {
     },
     /*** required options, no checks done if they really exist, so be careful ***/
     name: "Xulmus",
-    hostApplication: "Songbird",
+    host: "Songbird",
 
     /*** optional options, there are checked for existence and a fallback provided  ***/
     features: ["bookmarks", "hints", "marks", "history", "quickmarks", "session", "tabs", "player"],
diff --git a/xulmus/content/dactyl.dtd b/xulmus/content/dactyl.dtd
index 195c57cb..3339fd05 100644
--- a/xulmus/content/dactyl.dtd
+++ b/xulmus/content/dactyl.dtd
@@ -8,6 +8,7 @@
 <!ENTITY dactyl.idName "XULMUS">
 <!ENTITY dactyl.host "&brandShortName;">
 <!ENTITY dactyl.hostbin "songbird">
+<!ENTITY dactyl.fileExt "xulmus">
 <!ENTITY dactyl.statusBefore "statusbar-display">
 <!ENTITY dactyl.statusAfter "">