--- a/modules/libpref/init/StaticPrefList.yaml
+++ b/modules/libpref/init/StaticPrefList.yaml
@@ -16172,16 +16172,28 @@
 
 # When true, the caret is not moved to the right click point in focused editable
 # content.
 - name: ui.mouse.right_click.move_caret.stop_if_in_focused_editable_node
   type: bool
   value: false
   mirror: always
 
+#ifdef XP_MACOSX
+# This will automatically enable text substitution for editable elements in HTML.
+# This value is like layout.spellCheckDefault.
+# 0 ... Disabled
+# 1 ... textarea, contenteditable and design mode
+# 2 ... text, textarea, contenteditable and design mode
+- name: ui.autocorrectDefault
+  type: uint32_t
+  value: 1
+  mirror: always
+#endif
+
 #---------------------------------------------------------------------------
 # Prefs starting with "urlclassifier."
 #---------------------------------------------------------------------------
 
 # Update server response timeout for Safe Browsing.
 - name: urlclassifier.update.response_timeout_ms
   type: uint32_t
   value: 30000
@@ -17166,16 +17178,43 @@
   type: bool
 #if defined(XP_MACOSX)
   value: true
 #else
   value: false
 #endif
   mirror: always
 
+#ifdef XP_MACOSX
+# The folllowing widget.macos.automatic.* prefs are whether Gecko turns on
+# text replacement features.
+- name: widget.macos.automatic.text_replacement
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the smart dash feature is enabled
+- name: widget.macos.automatic.dash_substitution
+  type: bool
+  value: false
+  mirror: always
+
+# Whether the smart quote feature is enabled
+- name: widget.macos.automatic.quote_substitution
+  type: bool
+  value: false
+  mirror: always
+
+# fetching length when processing text substitution.
+- name: widget.macos.automatic.text_substitution_fetch_length
+  type: uint32_t
+  value: 20
+  mirror: always
+#endif
+
 # Whether to render in to a child SurfaceControl rather than directly into the SurfaceView
 - name: widget.android.use-surfacecontrol
   type: bool
   value: false
   mirror: once
 
 #ifdef ANDROID
 # A threshold value for double click by mouse.