diff --git a/components/style/gecko/non_ts_pseudo_class_list.rs b/components/style/gecko/non_ts_pseudo_class_list.rs
index eca60fdc586..8d9fc3d2d85 100644
--- a/components/style/gecko/non_ts_pseudo_class_list.rs
+++ b/components/style/gecko/non_ts_pseudo_class_list.rs
@@ -48,8 +48,7 @@ macro_rules! apply_non_ts_list {
                 ("indeterminate", Indeterminate, indeterminate, IN_INDETERMINATE_STATE, _),
                 ("-moz-devtools-highlighted", MozDevtoolsHighlighted, mozDevtoolsHighlighted, IN_DEVTOOLS_HIGHLIGHTED_STATE, PSEUDO_CLASS_ENABLED_IN_UA_SHEETS),
                 ("-moz-styleeditor-transitioning", MozStyleeditorTransitioning, mozStyleeditorTransitioning, IN_STYLEEDITOR_TRANSITIONING_STATE, PSEUDO_CLASS_ENABLED_IN_UA_SHEETS),
-                ("fullscreen", Fullscreen, fullscreen, IN_FULLSCREEN_STATE, PSEUDO_CLASS_ENABLED_IN_UA_SHEETS_AND_CHROME),
-                ("-moz-full-screen", MozFullScreen, mozFullScreen, IN_FULLSCREEN_STATE, _),
+                ("fullscreen", Fullscreen, fullscreen, IN_FULLSCREEN_STATE, _),
                 // TODO(emilio): This is inconsistently named (the capital R).
                 ("-moz-focusring", MozFocusRing, mozFocusRing, IN_FOCUSRING_STATE, _),
                 ("-moz-broken", MozBroken, mozBroken, IN_BROKEN_STATE, _),
diff --git a/components/style/gecko/selector_parser.rs b/components/style/gecko/selector_parser.rs
index fec3c9247c3..18878213244 100644
--- a/components/style/gecko/selector_parser.rs
+++ b/components/style/gecko/selector_parser.rs
@@ -137,6 +137,7 @@ impl NonTSPseudoClass {
             ([$(($css:expr, $name:ident, $gecko_type:tt, $state:tt, $flags:tt),)*]) => {
                 match_ignore_ascii_case! { &name,
                     $($css => Some(NonTSPseudoClass::$name),)*
+                    "-moz-full-screen" => Some(NonTSPseudoClass::Fullscreen),
                     _ => None,
                 }
             }
@@ -169,16 +170,9 @@ impl NonTSPseudoClass {
     }
 
     /// Returns whether the pseudo-class is enabled in content sheets.
+    #[inline]
     fn is_enabled_in_content(&self) -> bool {
-        match *self {
-            // For pseudo-classes with pref, the availability in content
-            // depends on the pref.
-            NonTSPseudoClass::Fullscreen => static_prefs::pref!("full-screen-api.unprefix.enabled"),
-            // Otherwise, a pseudo-class is enabled in content when it
-            // doesn't have any enabled flag.
-            _ => !self
-                .has_any_flag(NonTSPseudoClassFlag::PSEUDO_CLASS_ENABLED_IN_UA_SHEETS_AND_CHROME),
-        }
+        !self.has_any_flag(NonTSPseudoClassFlag::PSEUDO_CLASS_ENABLED_IN_UA_SHEETS_AND_CHROME)
     }
 
     /// Get the state flag associated with a pseudo-class, if any.
diff --git a/components/style/gecko/wrapper.rs b/components/style/gecko/wrapper.rs
index e0079921072..21fffb975c7 100644
--- a/components/style/gecko/wrapper.rs
+++ b/components/style/gecko/wrapper.rs
@@ -2045,7 +2045,6 @@ impl<'le> ::selectors::Element for GeckoElement<'le> {
             NonTSPseudoClass::Disabled |
             NonTSPseudoClass::Checked |
             NonTSPseudoClass::Fullscreen |
-            NonTSPseudoClass::MozFullScreen |
             NonTSPseudoClass::Indeterminate |
             NonTSPseudoClass::PlaceholderShown |
             NonTSPseudoClass::Target |