diff --git a/components/style/gecko/selector_parser.rs b/components/style/gecko/selector_parser.rs
index 8a3224938b9..336df501325 100644
--- a/components/style/gecko/selector_parser.rs
+++ b/components/style/gecko/selector_parser.rs
@@ -139,9 +139,6 @@ impl NonTSPseudoClass {
     /// Returns whether the pseudo-class is enabled in content sheets.
     #[inline]
     fn is_enabled_in_content(&self) -> bool {
-        if let NonTSPseudoClass::MozLocaleDir(..) = *self {
-            return static_prefs::pref!("layout.css.moz-locale-dir.content.enabled");
-        }
         !self.has_any_flag(NonTSPseudoClassFlag::PSEUDO_CLASS_ENABLED_IN_UA_SHEETS_AND_CHROME)
     }