diff --git a/browser/base/content/nsContextMenu.js b/browser/base/content/nsContextMenu.js
index fcc4e50eb8f9..548f4372ae00 100644
--- a/browser/base/content/nsContextMenu.js
+++ b/browser/base/content/nsContextMenu.js
@@ -384,7 +384,8 @@ nsContextMenu.prototype = {
     if (canSpell) {
       var dictMenu = document.getElementById("spell-dictionaries-menu");
       var dictSep = document.getElementById("spell-language-separator");
-      InlineSpellCheckerUI.addDictionaryListToMenu(dictMenu, dictSep);
+      let count = InlineSpellCheckerUI.addDictionaryListToMenu(dictMenu, dictSep);
+      this.showItem(dictSep, count > 0);
       this.showItem("spell-add-dictionaries-main", false);
     }
     else if (this.onEditableArea) {
diff --git a/toolkit/modules/InlineSpellChecker.jsm b/toolkit/modules/InlineSpellChecker.jsm
index 917ea0561589..8c63133148b3 100644
--- a/toolkit/modules/InlineSpellChecker.jsm
+++ b/toolkit/modules/InlineSpellChecker.jsm
@@ -159,6 +159,11 @@ InlineSpellChecker.prototype = {
     if (! this.mInlineSpellChecker || ! this.enabled)
       return 0;
     var spellchecker = this.mInlineSpellChecker.spellChecker;
+
+    // Cannot access the dictionary list from another process so just return 0.
+    if (Components.utils.isCrossProcessWrapper(spellchecker))
+      return 0;
+
     var o1 = {}, o2 = {};
     spellchecker.GetDictionaryList(o1, o2);
     var list = o1.value;