diff --git a/css/selectors/-moz-system-metric.json b/css/selectors/-moz-system-metric.json
index 4bd91b21cb1ce8..81b068d31fa573 100644
--- a/css/selectors/-moz-system-metric.json
+++ b/css/selectors/-moz-system-metric.json
@@ -64,7 +64,7 @@
         "images-in-menus": {
           "__compat": {
             "description": "<code>:-moz-system-metric(images-in-menus)</code>",
-            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric(images-in-menus)",
+            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric/images-in-menus",
             "support": {
               "chrome": {
                 "version_added": false
@@ -126,7 +126,7 @@
         "mac-graphite-theme": {
           "__compat": {
             "description": "<code>:-moz-system-metric(mac-graphite-theme)</code>",
-            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric(mac-graphite-theme)",
+            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric/mac-graphite-theme",
             "support": {
               "chrome": {
                 "version_added": false
@@ -188,7 +188,7 @@
         "scrollbar-end-backward": {
           "__compat": {
             "description": "<code>:-moz-system-metric(scrollbar-end-backward)</code>",
-            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric(scrollbar-end-backward)",
+            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric/scrollbar-end-backward",
             "support": {
               "chrome": {
                 "version_added": false
@@ -250,7 +250,7 @@
         "scrollbar-end-forward": {
           "__compat": {
             "description": "<code>:-moz-system-metric(scrollbar-end-forward)</code>",
-            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric(scrollbar-end-forward)",
+            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric/scrollbar-end-forward",
             "support": {
               "chrome": {
                 "version_added": false
@@ -312,7 +312,7 @@
         "scrollbar-start-backward": {
           "__compat": {
             "description": "<code>:-moz-system-metric(scrollbar-start-backward)</code>",
-            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric(scrollbar-start-backward)",
+            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric/scrollbar-start-backward",
             "support": {
               "chrome": {
                 "version_added": false
@@ -374,7 +374,7 @@
         "scrollbar-start-forward": {
           "__compat": {
             "description": "<code>:-moz-system-metric(scrollbar-start-forward)</code>",
-            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric(scrollbar-start-forward)",
+            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric/scrollbar-start-forward",
             "support": {
               "chrome": {
                 "version_added": false
@@ -436,7 +436,7 @@
         "scrollbar-thumb-proportional": {
           "__compat": {
             "description": "<code>:-moz-system-metric(scrollbar-thumb-proportional)</code>",
-            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric(scrollbar-thumb-proportional)",
+            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric/scrollbar-thumb-proportional",
             "support": {
               "chrome": {
                 "version_added": false
@@ -498,7 +498,7 @@
         "touch-enabled": {
           "__compat": {
             "description": "<code>:-moz-system-metric(touch-enabled)</code>",
-            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric(touch-enabled)",
+            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric/touch-enabled",
             "support": {
               "chrome": {
                 "version_added": false
@@ -560,7 +560,7 @@
         "windows-default-theme": {
           "__compat": {
             "description": "<code>:-moz-system-metric(windows-default-theme)</code>",
-            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric(windows-default-theme)",
+            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:-moz-system-metric/windows-default-theme",
             "support": {
               "chrome": {
                 "version_added": false