diff --git a/features/css-object-model.yml b/features/css-object-model.yml
index e2eb7f53c11..2e8d6c8d7aa 100644
--- a/features/css-object-model.yml
+++ b/features/css-object-model.yml
@@ -81,3 +81,10 @@ compat_features:
   - api.CSSMarginRule
   - api.CSSMarginRule.name
   - api.CSSMarginRule.style
+  - api.CSSConditionRule
+  - api.CSSConditionRule.conditionText
+  - api.CSSMediaRule
+  - api.CSSMediaRule.media
+  - api.CSSPseudoElement
+  - api.CSSPseudoElement.element
+  - api.CSSPseudoElement.type
diff --git a/features/css-object-model.yml.dist b/features/css-object-model.yml.dist
index f2ca5118fa7..fb54ff31c09 100644
--- a/features/css-object-model.yml.dist
+++ b/features/css-object-model.yml.dist
@@ -78,6 +78,8 @@ compat_features:
   #   firefox_android: "4"
   #   safari: "3"
   #   safari_ios: "1"
+  - api.CSSMediaRule
+  - api.CSSMediaRule.media
   - api.HTMLElement.style
 
   # baseline: high
@@ -204,6 +206,20 @@ compat_features:
   - api.CSSGroupingRule.deleteRule
   - api.CSSGroupingRule.insertRule
 
+  # baseline: high
+  # baseline_low_date: 2021-04-26
+  # baseline_high_date: 2023-10-26
+  # support:
+  #   chrome: "56"
+  #   chrome_android: "56"
+  #   edge: "12"
+  #   firefox: "20"
+  #   firefox_android: "20"
+  #   safari: "14.1"
+  #   safari_ios: "14.5"
+  - api.CSSConditionRule
+  - api.CSSConditionRule.conditionText
+
   # baseline: low
   # baseline_low_date: 2023-02-14
   # support:
@@ -249,3 +265,6 @@ compat_features:
   - api.CSSMarginRule
   - api.CSSMarginRule.name
   - api.CSSMarginRule.style
+  - api.CSSPseudoElement
+  - api.CSSPseudoElement.element
+  - api.CSSPseudoElement.type
diff --git a/features/css-supports.yml b/features/css-supports.yml
new file mode 100644
index 00000000000..3f3d521b4fc
--- /dev/null
+++ b/features/css-supports.yml
@@ -0,0 +1,7 @@
+name: CSS.supports()
+description: The `CSS.supports()` static method returns whether the browser supports a CSS declaration (given by two arguments, a property and value) or an `@supports` at-rule condition string.
+spec: https://drafts.csswg.org/css-conditional-3/#the-css-namespace
+caniuse: css-supports-api
+group: css
+compat_features:
+  - api.CSS.supports_static
diff --git a/features/css-supports.yml.dist b/features/css-supports.yml.dist
new file mode 100644
index 00000000000..d89614f9748
--- /dev/null
+++ b/features/css-supports.yml.dist
@@ -0,0 +1,17 @@
+# Generated from: css-supports.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: high
+  baseline_low_date: 2020-01-15
+  baseline_high_date: 2022-07-15
+  support:
+    chrome: "61"
+    chrome_android: "61"
+    edge: "79"
+    firefox: "55"
+    firefox_android: "55"
+    safari: "11"
+    safari_ios: "11"
+compat_features:
+  - api.CSS.supports_static