diff --git a/contributors/dugite-code.md b/contributors/dugite-code.md
new file mode 100644
index 00000000..dd3ed1a5
--- /dev/null
+++ b/contributors/dugite-code.md
@@ -0,0 +1,9 @@
+2018-08-21
+
+I hereby agree to the terms of the "Markdown Here Individual Contributor License Agreement", commit 5bb51a296ed5b0d941ac381420a19ed02886ae21.
+
+I furthermore declare that I am authorized and able to make this agreement and sign this declaration.
+
+Signed,
+
+Dugite-Code https://github.com/dugite-code
\ No newline at end of file
diff --git a/src/common/options-store.js b/src/common/options-store.js
index b741d833..447d8af5 100644
--- a/src/common/options-store.js
+++ b/src/common/options-store.js
@@ -327,10 +327,16 @@ var MozillaOptionsStore = {
           }
 
           try {
-            prefsObj[prefKeys[i]] = window.JSON.parse(
-                                      extPrefsBranch.getComplexValue(
-                                        prefKeys[i],
-                                        Components.interfaces.nsISupportsString).data);
+            if ( Services.vc.compare(Services.appinfo.platformVersion, '58') < 0 ) {
+              prefsObj[prefKeys[i]] = window.JSON.parse(
+                                        extPrefsBranch.getComplexValue(
+                                          prefKeys[i],
+                                          Components.interfaces.nsISupportsString).data);
+            } else {
+              prefsObj[prefKeys[i]] = window.JSON.parse(
+                                        extPrefsBranch.getStringPref(
+                                          prefKeys[i]));
+            }
           }
           catch(e) {
             // Null values and empty strings will result in JSON exceptions
diff --git a/src/firefox/chrome/content/background-services.js b/src/firefox/chrome/content/background-services.js
index aff59a59..75270803 100644
--- a/src/firefox/chrome/content/background-services.js
+++ b/src/firefox/chrome/content/background-services.js
@@ -16,12 +16,10 @@
  * No additional processing is done, like filling in default values.
  */
 
-
 (function() {
 "use strict";
 /*global Components:false, AddonManager:false, markdown_here:false*/
 /*jshint devel:true*/
-
 var scriptLoader, imports = {};
 
 // See comment in ff-overlay.js for info about module loading.
@@ -151,10 +149,16 @@ function prefsAccessRequestHandler(request) {
       }
 
       try {
-        prefsObj[prefKeys[i]] = JSON.parse(
-                                  extPrefsBranch.getComplexValue(
-                                    prefKeys[i],
-                                    Components.interfaces.nsISupportsString).data);
+        if ( Services.vc.compare(Services.appinfo.platformVersion, '58') < 0 ) {
+          prefsObj[prefKeys[i]] = JSON.parse(
+                                    extPrefsBranch.getComplexValue(
+                                      prefKeys[i],
+                                      Components.interfaces.nsISupportsString).data);
+        } else {
+          prefsObj[prefKeys[i]] = JSON.parse(
+                                    extPrefsBranch.getStringPref(
+                                      prefKeys[i]));
+        }
       }
       catch(e) {
         // Null values and empty strings will result in JSON exceptions
@@ -167,10 +171,16 @@ function prefsAccessRequestHandler(request) {
   else if (request.verb === 'set') {
     for (var key in request.obj) {
       supportString.data = JSON.stringify(request.obj[key]);
-      extPrefsBranch.setComplexValue(
-        key,
-        Components.interfaces.nsISupportsString,
-        supportString);
+      if ( Services.vc.compare(Services.appinfo.platformVersion, '58') < 0 ) {
+        extPrefsBranch.setComplexValue(
+          key,
+          Components.interfaces.nsISupportsString,
+          supportString);
+      } else {
+        extPrefsBranch.setStringPref(
+          key,
+          supportString.data);
+      }
     }
 
     return;
@@ -227,10 +237,16 @@ function updateHandler(currVer) {
 
   var lastVersion = '';
   try {
-    lastVersion = JSON.parse(
-                    extPrefsBranch.getComplexValue(
-                      'last-version',
-                      Components.interfaces.nsISupportsString).data);
+    if ( Services.vc.compare(Services.appinfo.platformVersion, '58') < 0 ) {
+        lastVersion = JSON.parse(
+                        extPrefsBranch.getComplexValue(
+                          'last-version',
+                          Components.interfaces.nsISupportsString).data);
+    } else {
+        lastVersion = JSON.parse(
+                        extPrefsBranch.getStringPref(
+                          'last-version'));
+    }
   }
   catch (ex) {
   }
@@ -239,17 +255,29 @@ function updateHandler(currVer) {
   var localFirstRun = !extPrefsBranch.prefHasUserValue('local-first-run');
 
   supportString.data = JSON.stringify(false);
-  extPrefsBranch.setComplexValue(
-    'local-first-run',
-    Components.interfaces.nsISupportsString,
-    supportString);
-
-  if (currVer !== lastVersion) {
-    supportString.data = JSON.stringify(currVer);
+  if ( Services.vc.compare(Services.appinfo.platformVersion, '58') < 0 ) {
     extPrefsBranch.setComplexValue(
-      'last-version',
+      'local-first-run',
       Components.interfaces.nsISupportsString,
       supportString);
+  } else {
+    extPrefsBranch.setStringPref(
+      'local-first-run',
+      supportString.data);
+  }
+
+  if (currVer !== lastVersion) {
+    supportString.data = JSON.stringify(currVer);
+    if ( Services.vc.compare(Services.appinfo.platformVersion, '58') < 0 ) {
+      extPrefsBranch.setComplexValue(
+        'last-version',
+        Components.interfaces.nsISupportsString,
+        supportString);
+    } else {
+      extPrefsBranch.setStringPref(
+        'last-version',
+        supportString.data);
+    }
 
     // Set the preference sync flags while we're at it.
 
diff --git a/src/firefox/chrome/content/options.xul b/src/firefox/chrome/content/options.xul
index d585f67c..19257a27 100644
--- a/src/firefox/chrome/content/options.xul
+++ b/src/firefox/chrome/content/options.xul
@@ -2,6 +2,7 @@
 <!DOCTYPE overlay SYSTEM "chrome://markdown_here/locale/strings.dtd">
 
 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
+<?xml-stylesheet href="chrome://messenger/skin/preferences/preferences.css" type="text/css"?>
 
 <prefwindow id="markdown-here-options-intermediate"
      title="&moz_options_dlg_title;"
diff --git a/src/install.rdf b/src/install.rdf
index 9185751c..cab41794 100644
--- a/src/install.rdf
+++ b/src/install.rdf
@@ -152,7 +152,6 @@
         <em:iconURL>resource://markdown_here_common/images/icon128.png</em:iconURL>
         <em:homepageURL>https://github.com/adam-p/markdown-here</em:homepageURL>
 
-        <em:optionsType>1</em:optionsType>
         <em:optionsURL>chrome://markdown_here/content/options.xul</em:optionsURL>
 
     </Description>