diff --git a/chrome/content/pref.js b/chrome/content/pref.js
index ba5e842..5620227 100644
--- a/chrome/content/pref.js
+++ b/chrome/content/pref.js
@@ -1,5 +1,63 @@
 // This needs: chrome://global/content/nsUserSettings.js
 
+// compat taken from http://qiita.com/sayamada/items/d6d26a3c2e9613854019
+var nsPreferences = {
+    orgPrefs: Components.classes["@mozilla.org/preferences-service;1"]
+        .getService(Components.interfaces.nsIPrefService)
+        .getBranch(""),
+    copyUnicharPref: function(key, defaultVal) {
+        if (defaultVal === undefined) {
+            defaultVal = "";
+        }
+        var val = undefined;
+        try {
+            val = this.orgPrefs.getComplexValue(key, Components.interfaces.nsISupportsString).data;
+        } catch (e) {
+            console.log(e);
+        }
+        if (val !== undefined && val !== "") {
+            return val;
+        } else {
+            return defaultVal;
+        }
+    },
+    setUnicharPref: function(key, val) {
+        var str = Components.classes["@mozilla.org/supports-string;1"]
+            .createInstance(Components.interfaces.nsISupportsString);
+        str.data = val;
+        this.orgPrefs.setComplexValue(key, Components.interfaces.nsISupportsString, str);
+    },
+    getBoolPref: function(key, defaultVal) {
+        try {
+            var tmpVal = this.orgPrefs.getBoolPref(key);
+            if (tmpVal || tmpVal === "true") {
+                return true;
+            } else {
+                return false;
+            }
+        } catch (e) {
+            return defaultVal;
+        }
+    },
+    setBoolPref: function(key, val) {
+        if (val || val === "true") {
+            this.orgPrefs.setBoolPref(key, true);
+        } else {
+            this.orgPrefs.setBoolPref(key, false);
+        }
+    },
+    getIntPref: function(key, defaultVal) {
+        try {
+            return this.orgPrefs.getIntPref(key);
+        } catch (e) {
+            return defaultVal;
+        }
+    },
+    setIntPref: function(key, val) {
+        this.orgPrefs.setIntPref(key, val);
+    }
+};
+
 //-----------------------------------------------------------------------------
 var strbundle;
 function getLocaleString(aName)
diff --git a/install.rdf b/install.rdf
index d357c1d..86b0d16 100644
--- a/install.rdf
+++ b/install.rdf
@@ -6,20 +6,19 @@
   <r:Description about="urn:mozilla:install-manifest">
     <id>{11d1a081-b8c3-4002-af38-6ad3e899fdfa}</id>
 
-    <name>External Editor</name>
+    <name>External Editor with TB52 compatibility</name>
     <type>2</type>
-    <version>1.0.0</version>
+    <version>1.0.1-unofficial</version>
     <!-- description done with the prefs.js and locale/properties files -->
     <creator>Alexandre Feblot</creator>
-    <homepageURL>http://globs.org/</homepageURL>
-    <updateURL>https://harris.hostingzoom.com/~b2v/alex/update.rdf</updateURL>
+    <homepageURL>http://github.com/snipsnipsnip/exteditor/releases/</homepageURL>
     <iconURL>chrome://exteditor/content/exteditor.png</iconURL>
 
     <targetApplication>
       <r:Description>
         <id>{3550f703-e582-4d05-9a08-453d09bdfdc6}</id>
-        <minVersion>3.1</minVersion>
-        <maxVersion>9.0.*</maxVersion>
+        <minVersion>52</minVersion>
+        <maxVersion>52</maxVersion>
       </r:Description>
     </targetApplication>