diff --git a/components/style/values/computed/length.rs b/components/style/values/computed/length.rs
index 3c4f7a2dbdc..02b42b48241 100644
--- a/components/style/values/computed/length.rs
+++ b/components/style/values/computed/length.rs
@@ -189,7 +189,7 @@ impl Size {
             #[cfg(feature = "gecko")]
             GenericSize::MinContent |
             GenericSize::MaxContent |
-            GenericSize::MozFitContent |
+            GenericSize::FitContent |
             GenericSize::MozAvailable |
             GenericSize::FitContentFunction(_) => false
         }
diff --git a/components/style/values/generics/length.rs b/components/style/values/generics/length.rs
index dfb3504e3cf..8d2596fffae 100644
--- a/components/style/values/generics/length.rs
+++ b/components/style/values/generics/length.rs
@@ -157,7 +157,7 @@ pub enum GenericSize<LengthPercent> {
     MinContent,
     #[cfg(feature = "gecko")]
     #[animation(error)]
-    MozFitContent,
+    FitContent,
     #[cfg(feature = "gecko")]
     #[animation(error)]
     MozAvailable,
@@ -207,15 +207,13 @@ pub enum GenericMaxSize<LengthPercent> {
     None,
     #[cfg(feature = "gecko")]
     #[animation(error)]
-    #[parse(aliases = "-moz-max-content")]
     MaxContent,
     #[cfg(feature = "gecko")]
     #[animation(error)]
-    #[parse(aliases = "-moz-min-content")]
     MinContent,
     #[cfg(feature = "gecko")]
     #[animation(error)]
-    MozFitContent,
+    FitContent,
     #[cfg(feature = "gecko")]
     #[animation(error)]
     MozAvailable,
diff --git a/components/style/values/specified/length.rs b/components/style/values/specified/length.rs
index e73a9ddfde0..6105155d81d 100644
--- a/components/style/values/specified/length.rs
+++ b/components/style/values/specified/length.rs
@@ -1235,7 +1235,7 @@ macro_rules! parse_size_non_length {
                 #[cfg(feature = "gecko")]
                 "max-content" | "-moz-max-content" => $size::MaxContent,
                 #[cfg(feature = "gecko")]
-                "-moz-fit-content" => $size::MozFitContent,
+                "fit-content" | "-moz-fit-content" => $size::FitContent,
                 #[cfg(feature = "gecko")]
                 "-moz-available" => $size::MozAvailable,
                 $auto_or_none => $size::$auto_or_none_ident,