diff --git a/components/style/gecko/media_features.rs b/components/style/gecko/media_features.rs
index 62d674aa318..a3000f46bb4 100644
--- a/components/style/gecko/media_features.rs
+++ b/components/style/gecko/media_features.rs
@@ -624,7 +624,7 @@ macro_rules! bool_pref_feature {
 /// to support new types in these entries and (2) ensuring that either
 /// nsPresContext::MediaFeatureValuesChanged is called when the value that
 /// would be returned by the evaluator function could change.
-pub static MEDIA_FEATURES: [MediaFeatureDescription; 63] = [
+pub static MEDIA_FEATURES: [MediaFeatureDescription; 62] = [
     feature!(
         atom!("width"),
         AllowsRanges::Yes,
@@ -860,7 +860,6 @@ pub static MEDIA_FEATURES: [MediaFeatureDescription; 63] = [
     lnf_int_feature!(atom!("-moz-system-dark-theme"), SystemUsesDarkTheme),
 
     bool_pref_feature!(atom!("-moz-proton"), "browser.proton.enabled"),
-    bool_pref_feature!(atom!("-moz-proton-urlbar"), "browser.proton.urlbar.enabled"),
     bool_pref_feature!(atom!("-moz-proton-modals"), "browser.proton.modals.enabled"),
     bool_pref_feature!(atom!("-moz-proton-contextmenus"), "browser.proton.contextmenus.enabled"),
     bool_pref_feature!(atom!("-moz-proton-doorhangers"), "browser.proton.doorhangers.enabled"),