diff --git a/components/style/gecko/generated/gecko_pseudo_element_helper.rs b/components/style/gecko/generated/gecko_pseudo_element_helper.rs
index 05aebe41274..949bf6a7c6e 100644
--- a/components/style/gecko/generated/gecko_pseudo_element_helper.rs
+++ b/components/style/gecko/generated/gecko_pseudo_element_helper.rs
@@ -130,9 +130,6 @@
     pseudo_element!(":-moz-button-content",
                     atom!(":-moz-button-content"),
                     true);
-    pseudo_element!(":-moz-buttonlabel",
-                    atom!(":-moz-buttonlabel"),
-                    true);
     pseudo_element!(":-moz-cell-content",
                     atom!(":-moz-cell-content"),
                     true);
diff --git a/components/style/gecko_string_cache/atom_macro.rs b/components/style/gecko_string_cache/atom_macro.rs
index 55ec1f00247..c8e75a54af0 100644
--- a/components/style/gecko_string_cache/atom_macro.rs
+++ b/components/style/gecko_string_cache/atom_macro.rs
@@ -748,6 +748,8 @@ cfg_if! {
             pub static nsGkAtoms_focus: *mut nsIAtom;
             #[link_name = "_ZN9nsGkAtoms7focusedE"]
             pub static nsGkAtoms_focused: *mut nsIAtom;
+            #[link_name = "_ZN9nsGkAtoms12followanchorE"]
+            pub static nsGkAtoms_followanchor: *mut nsIAtom;
             #[link_name = "_ZN9nsGkAtoms9followingE"]
             pub static nsGkAtoms_following: *mut nsIAtom;
             #[link_name = "_ZN9nsGkAtoms16followingSiblingE"]
@@ -1344,6 +1346,8 @@ cfg_if! {
             pub static nsGkAtoms_onafterscriptexecute: *mut nsIAtom;
             #[link_name = "_ZN9nsGkAtoms10onalertingE"]
             pub static nsGkAtoms_onalerting: *mut nsIAtom;
+            #[link_name = "_ZN9nsGkAtoms17onanimationcancelE"]
+            pub static nsGkAtoms_onanimationcancel: *mut nsIAtom;
             #[link_name = "_ZN9nsGkAtoms14onanimationendE"]
             pub static nsGkAtoms_onanimationend: *mut nsIAtom;
             #[link_name = "_ZN9nsGkAtoms20onanimationiterationE"]
@@ -4202,6 +4206,8 @@ cfg_if! {
             pub static nsGkAtoms_restylableAnonymousNode: *mut nsIAtom;
             #[link_name = "_ZN9nsGkAtoms16paintRequestTimeE"]
             pub static nsGkAtoms_paintRequestTime: *mut nsIAtom;
+            #[link_name = "_ZN9nsGkAtoms14pseudoPropertyE"]
+            pub static nsGkAtoms_pseudoProperty: *mut nsIAtom;
             #[link_name = "_ZN9nsGkAtoms8JapaneseE"]
             pub static nsGkAtoms_Japanese: *mut nsIAtom;
             #[link_name = "_ZN9nsGkAtoms7ChineseE"]
@@ -4836,8 +4842,6 @@ cfg_if! {
             pub static nsCSSAnonBoxes_mozLineFrame: *mut nsICSSAnonBoxPseudo;
             #[link_name = "_ZN14nsCSSAnonBoxes13buttonContentE"]
             pub static nsCSSAnonBoxes_buttonContent: *mut nsICSSAnonBoxPseudo;
-            #[link_name = "_ZN14nsCSSAnonBoxes14mozButtonLabelE"]
-            pub static nsCSSAnonBoxes_mozButtonLabel: *mut nsICSSAnonBoxPseudo;
             #[link_name = "_ZN14nsCSSAnonBoxes11cellContentE"]
             pub static nsCSSAnonBoxes_cellContent: *mut nsICSSAnonBoxPseudo;
             #[link_name = "_ZN14nsCSSAnonBoxes12dropDownListE"]
@@ -5665,6 +5669,8 @@ cfg_if! {
             pub static nsGkAtoms_focus: *mut nsIAtom;
             #[link_name = "?focused@nsGkAtoms@@2PEAVnsIAtom@@EA"]
             pub static nsGkAtoms_focused: *mut nsIAtom;
+            #[link_name = "?followanchor@nsGkAtoms@@2PEAVnsIAtom@@EA"]
+            pub static nsGkAtoms_followanchor: *mut nsIAtom;
             #[link_name = "?following@nsGkAtoms@@2PEAVnsIAtom@@EA"]
             pub static nsGkAtoms_following: *mut nsIAtom;
             #[link_name = "?followingSibling@nsGkAtoms@@2PEAVnsIAtom@@EA"]
@@ -6261,6 +6267,8 @@ cfg_if! {
             pub static nsGkAtoms_onafterscriptexecute: *mut nsIAtom;
             #[link_name = "?onalerting@nsGkAtoms@@2PEAVnsIAtom@@EA"]
             pub static nsGkAtoms_onalerting: *mut nsIAtom;
+            #[link_name = "?onanimationcancel@nsGkAtoms@@2PEAVnsIAtom@@EA"]
+            pub static nsGkAtoms_onanimationcancel: *mut nsIAtom;
             #[link_name = "?onanimationend@nsGkAtoms@@2PEAVnsIAtom@@EA"]
             pub static nsGkAtoms_onanimationend: *mut nsIAtom;
             #[link_name = "?onanimationiteration@nsGkAtoms@@2PEAVnsIAtom@@EA"]
@@ -9119,6 +9127,8 @@ cfg_if! {
             pub static nsGkAtoms_restylableAnonymousNode: *mut nsIAtom;
             #[link_name = "?paintRequestTime@nsGkAtoms@@2PEAVnsIAtom@@EA"]
             pub static nsGkAtoms_paintRequestTime: *mut nsIAtom;
+            #[link_name = "?pseudoProperty@nsGkAtoms@@2PEAVnsIAtom@@EA"]
+            pub static nsGkAtoms_pseudoProperty: *mut nsIAtom;
             #[link_name = "?Japanese@nsGkAtoms@@2PEAVnsIAtom@@EA"]
             pub static nsGkAtoms_Japanese: *mut nsIAtom;
             #[link_name = "?Chinese@nsGkAtoms@@2PEAVnsIAtom@@EA"]
@@ -9753,8 +9763,6 @@ cfg_if! {
             pub static nsCSSAnonBoxes_mozLineFrame: *mut nsICSSAnonBoxPseudo;
             #[link_name = "?buttonContent@nsCSSAnonBoxes@@2PEAVnsICSSAnonBoxPseudo@@EA"]
             pub static nsCSSAnonBoxes_buttonContent: *mut nsICSSAnonBoxPseudo;
-            #[link_name = "?mozButtonLabel@nsCSSAnonBoxes@@2PEAVnsICSSAnonBoxPseudo@@EA"]
-            pub static nsCSSAnonBoxes_mozButtonLabel: *mut nsICSSAnonBoxPseudo;
             #[link_name = "?cellContent@nsCSSAnonBoxes@@2PEAVnsICSSAnonBoxPseudo@@EA"]
             pub static nsCSSAnonBoxes_cellContent: *mut nsICSSAnonBoxPseudo;
             #[link_name = "?dropDownList@nsCSSAnonBoxes@@2PEAVnsICSSAnonBoxPseudo@@EA"]
@@ -10582,6 +10590,8 @@ cfg_if! {
             pub static nsGkAtoms_focus: *mut nsIAtom;
             #[link_name = "\x01?focused@nsGkAtoms@@2PAVnsIAtom@@A"]
             pub static nsGkAtoms_focused: *mut nsIAtom;
+            #[link_name = "\x01?followanchor@nsGkAtoms@@2PAVnsIAtom@@A"]
+            pub static nsGkAtoms_followanchor: *mut nsIAtom;
             #[link_name = "\x01?following@nsGkAtoms@@2PAVnsIAtom@@A"]
             pub static nsGkAtoms_following: *mut nsIAtom;
             #[link_name = "\x01?followingSibling@nsGkAtoms@@2PAVnsIAtom@@A"]
@@ -11178,6 +11188,8 @@ cfg_if! {
             pub static nsGkAtoms_onafterscriptexecute: *mut nsIAtom;
             #[link_name = "\x01?onalerting@nsGkAtoms@@2PAVnsIAtom@@A"]
             pub static nsGkAtoms_onalerting: *mut nsIAtom;
+            #[link_name = "\x01?onanimationcancel@nsGkAtoms@@2PAVnsIAtom@@A"]
+            pub static nsGkAtoms_onanimationcancel: *mut nsIAtom;
             #[link_name = "\x01?onanimationend@nsGkAtoms@@2PAVnsIAtom@@A"]
             pub static nsGkAtoms_onanimationend: *mut nsIAtom;
             #[link_name = "\x01?onanimationiteration@nsGkAtoms@@2PAVnsIAtom@@A"]
@@ -14036,6 +14048,8 @@ cfg_if! {
             pub static nsGkAtoms_restylableAnonymousNode: *mut nsIAtom;
             #[link_name = "\x01?paintRequestTime@nsGkAtoms@@2PAVnsIAtom@@A"]
             pub static nsGkAtoms_paintRequestTime: *mut nsIAtom;
+            #[link_name = "\x01?pseudoProperty@nsGkAtoms@@2PAVnsIAtom@@A"]
+            pub static nsGkAtoms_pseudoProperty: *mut nsIAtom;
             #[link_name = "\x01?Japanese@nsGkAtoms@@2PAVnsIAtom@@A"]
             pub static nsGkAtoms_Japanese: *mut nsIAtom;
             #[link_name = "\x01?Chinese@nsGkAtoms@@2PAVnsIAtom@@A"]
@@ -14670,8 +14684,6 @@ cfg_if! {
             pub static nsCSSAnonBoxes_mozLineFrame: *mut nsICSSAnonBoxPseudo;
             #[link_name = "\x01?buttonContent@nsCSSAnonBoxes@@2PAVnsICSSAnonBoxPseudo@@A"]
             pub static nsCSSAnonBoxes_buttonContent: *mut nsICSSAnonBoxPseudo;
-            #[link_name = "\x01?mozButtonLabel@nsCSSAnonBoxes@@2PAVnsICSSAnonBoxPseudo@@A"]
-            pub static nsCSSAnonBoxes_mozButtonLabel: *mut nsICSSAnonBoxPseudo;
             #[link_name = "\x01?cellContent@nsCSSAnonBoxes@@2PAVnsICSSAnonBoxPseudo@@A"]
             pub static nsCSSAnonBoxes_cellContent: *mut nsICSSAnonBoxPseudo;
             #[link_name = "\x01?dropDownList@nsCSSAnonBoxes@@2PAVnsICSSAnonBoxPseudo@@A"]
@@ -15502,6 +15514,8 @@ macro_rules! atom {
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_focus as *mut _) } };
 ("focused") =>
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_focused as *mut _) } };
+("followanchor") =>
+  { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_followanchor as *mut _) } };
 ("following") =>
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_following as *mut _) } };
 ("following-sibling") =>
@@ -16098,6 +16112,8 @@ macro_rules! atom {
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_onafterscriptexecute as *mut _) } };
 ("onalerting") =>
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_onalerting as *mut _) } };
+("onanimationcancel") =>
+  { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_onanimationcancel as *mut _) } };
 ("onanimationend") =>
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_onanimationend as *mut _) } };
 ("onanimationiteration") =>
@@ -18956,6 +18972,8 @@ macro_rules! atom {
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_restylableAnonymousNode as *mut _) } };
 ("PaintRequestTime") =>
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_paintRequestTime as *mut _) } };
+("PseudoProperty") =>
+  { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_pseudoProperty as *mut _) } };
 ("ja") =>
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsGkAtoms_Japanese as *mut _) } };
 ("zh-CN") =>
@@ -19590,8 +19608,6 @@ macro_rules! atom {
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsCSSAnonBoxes_mozLineFrame as *mut _) } };
 (":-moz-button-content") =>
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsCSSAnonBoxes_buttonContent as *mut _) } };
-(":-moz-buttonlabel") =>
-  { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsCSSAnonBoxes_mozButtonLabel as *mut _) } };
 (":-moz-cell-content") =>
   { unsafe { $crate::string_cache::atom_macro::atom_from_static($crate::string_cache::atom_macro::nsCSSAnonBoxes_cellContent as *mut _) } };
 (":-moz-dropdown-list") =>