diff --git a/b2g/app/b2g.js b/b2g/app/b2g.js
index 207cf8d3fa2e..239a7b0a8f38 100644
--- a/b2g/app/b2g.js
+++ b/b2g/app/b2g.js
@@ -889,9 +889,6 @@ pref("layout.accessiblecaret.enabled", true);
 // by the spec in bug 921965.
 pref("layout.accessiblecaret.bar.enabled", true);
 
-// Hide the caret in cursor mode after 3 seconds.
-pref("layout.accessiblecaret.timeout_ms", 3000);
-
 // Hide carets and text selection dialog during scrolling.
 pref("layout.accessiblecaret.always_show_when_scrolling", false);
 
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 0f45ec2cff16..9e478b478b3d 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -5287,10 +5287,6 @@ pref("layout.accessiblecaret.bar.enabled", false);
 // Show the caret when long tapping on an empty content.
 pref("layout.accessiblecaret.caret_shown_when_long_tapping_on_empty_content", false);
 
-// Timeout in milliseconds to hide the accessiblecaret under cursor mode while
-// no one touches it. Set the value to 0 to disable this feature.
-pref("layout.accessiblecaret.timeout_ms", 0);
-
 // Simulate long tap to select words on the platforms where APZ is not enabled
 // or long tap events does not fired by APZ.
 pref("layout.accessiblecaret.use_long_tap_injector", false);