diff --git a/components/script/dom/cssrule.rs b/components/script/dom/cssrule.rs
index cea98258786..1cd8c6c715f 100644
--- a/components/script/dom/cssrule.rs
+++ b/components/script/dom/cssrule.rs
@@ -106,6 +106,7 @@ impl CSSRule {
             StyleCssRule::LayerBlock(_) => unimplemented!(), // TODO
             StyleCssRule::LayerStatement(_) => unimplemented!(), // TODO
             StyleCssRule::FontPaletteValues(_) => unimplemented!(), // TODO
+            StyleCssRule::Property(_) => unimplemented!(),  // TODO
         }
     }
 
diff --git a/components/style/properties_and_values/rule.rs b/components/style/properties_and_values/rule.rs
index 3392e68124b..916f7e93560 100644
--- a/components/style/properties_and_values/rule.rs
+++ b/components/style/properties_and_values/rule.rs
@@ -17,6 +17,7 @@ use cssparser::{
     AtRuleParser, CowRcStr, DeclarationParser, ParseErrorKind, Parser, QualifiedRuleParser,
     RuleBodyItemParser, RuleBodyParser, SourceLocation,
 };
+#[cfg(feature = "gecko")]
 use malloc_size_of::{MallocSizeOf, MallocSizeOfOps};
 use selectors::parser::SelectorParseErrorKind;
 use servo_arc::Arc;
@@ -162,7 +163,6 @@ macro_rules! property_descriptors {
     }
 }
 
-#[cfg(feature = "gecko")]
 property_descriptors! {
     /// <https://drafts.css-houdini.org/css-properties-values-api-1/#the-syntax-descriptor>
     "syntax" syntax: SyntaxDescriptor,
diff --git a/components/style/stylesheets/rule_parser.rs b/components/style/stylesheets/rule_parser.rs
index f1bd4c13fe0..8aee0326538 100644
--- a/components/style/stylesheets/rule_parser.rs
+++ b/components/style/stylesheets/rule_parser.rs
@@ -5,6 +5,7 @@
 //! Parsing of the stylesheet contents.
 
 use crate::counter_style::{parse_counter_style_body, parse_counter_style_name_definition};
+#[cfg(feature = "gecko")]
 use crate::custom_properties::parse_name as parse_custom_property_name;
 use crate::error_reporting::ContextualParseError;
 use crate::font_face::parse_font_face_block;
@@ -32,7 +33,9 @@ use crate::stylesheets::{
 };
 use crate::values::computed::font::FamilyName;
 use crate::values::{CssUrl, CustomIdent, DashedIdent, KeyframesName};
-use crate::{Atom, Namespace, Prefix};
+#[cfg(feature = "gecko")]
+use crate::Atom;
+use crate::{Namespace, Prefix};
 use cssparser::{
     AtRuleParser, BasicParseError, BasicParseErrorKind, CowRcStr, DeclarationParser, Parser,
     ParserState, QualifiedRuleParser, RuleBodyItemParser, RuleBodyParser, SourceLocation,
@@ -604,6 +607,7 @@ impl<'a, 'b, 'i> AtRuleParser<'i> for NestedRuleParser<'a, 'b, 'i> {
                     input.try_parse(|i| PageSelectors::parse(self.context, i)).unwrap_or_default()
                 )
             },
+            #[cfg(feature = "gecko")]
             "property" if static_prefs::pref!("layout.css.properties-and-values.enabled") => {
                 let name = input.expect_ident_cloned()?;
                 let name = parse_custom_property_name(&name).map_err(|_| {