diff --git a/features/parse-html-unsafe.yml b/features/parse-html-unsafe.yml
index 67eb30907fd..d9d22555582 100644
--- a/features/parse-html-unsafe.yml
+++ b/features/parse-html-unsafe.yml
@@ -1,3 +1,8 @@
 name: Unsanitized HTML parsing methods
 description: The `Document.parseHTMLUnsafe()` static method parses HTML into a DOM tree, while the `setHTMLUnsafe()` method of `Element` and `ShadowRoot` parses and inserts HTML into an existing tree. No sanitization applies to these methods, so never call them with user-provided HTML strings.
 spec: https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#unsafe-html-parsing-methods
+# TODO: https://github.com/web-platform-dx/web-features/issues/1971
+# Status changed: https://github.com/web-platform-dx/web-features/pull/3200
+# 2025-08-06 - low → false - In Safari, if there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and `connectedCallback()` methods are not called.
+# References:
+# - https://bugs.webkit.org/show_bug.cgi?id=296420
diff --git a/features/parse-html-unsafe.yml.dist b/features/parse-html-unsafe.yml.dist
index 4d5891b8c56..d009ba171d4 100644
--- a/features/parse-html-unsafe.yml.dist
+++ b/features/parse-html-unsafe.yml.dist
@@ -2,39 +2,30 @@
 # Do not edit this file by hand. Edit the source file instead!
 
 status:
-  baseline: low
-  baseline_low_date: 2024-07-09
+  baseline: false
   support:
     chrome: "124"
     chrome_android: "124"
     edge: "124"
     firefox: "128"
     firefox_android: "128"
-    safari: "17.4"
-    safari_ios: "17.4"
 compat_features:
-  # baseline: low
-  # baseline_low_date: 2024-04-18
+  # baseline: false
   # support:
   #   chrome: "124"
   #   chrome_android: "124"
   #   edge: "124"
   #   firefox: "123"
   #   firefox_android: "123"
-  #   safari: "17.4"
-  #   safari_ios: "17.4"
   - api.Element.setHTMLUnsafe
   - api.ShadowRoot.setHTMLUnsafe
 
   # ⬇️ Same status as overall feature ⬇️
-  # baseline: low
-  # baseline_low_date: 2024-07-09
+  # baseline: false
   # support:
   #   chrome: "124"
   #   chrome_android: "124"
   #   edge: "124"
   #   firefox: "128"
   #   firefox_android: "128"
-  #   safari: "17.4"
-  #   safari_ios: "17.4"
   - api.Document.parseHTMLUnsafe_static
diff --git a/package-lock.json b/package-lock.json
index ad462ef2d7a..ef2d8570473 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,7 @@
       "devDependencies": {
         "@eslint/js": "^9.32.0",
         "@js-temporal/polyfill": "^0.5.1",
-        "@mdn/browser-compat-data": "^6.0.36",
+        "@mdn/browser-compat-data": "^6.0.37",
         "@octokit/rest": "^22.0.0",
         "@types/caniuse-lite": "^1.0.4",
         "@types/node": "^20.19.9",
@@ -797,9 +797,9 @@
       }
     },
     "node_modules/@mdn/browser-compat-data": {
-      "version": "6.0.36",
-      "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-6.0.36.tgz",
-      "integrity": "sha512-bvPldvzuJ5FrIYPuXpoX7WedcBQzdia3rQpUbASxJ89ggzdh6Hxisfx3R5b4UwFOUEj3Qps9CAcToxhCrZI0Nw==",
+      "version": "6.0.37",
+      "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-6.0.37.tgz",
+      "integrity": "sha512-Z2+c0PAoKdrCNRHeOg6yLNx6oxVw1rYs6dz5MedomtVSINRMYNmUuEKKoq3EBp+bbcQI16v4KnksYl2wToCTUQ==",
       "license": "CC0-1.0"
     },
     "node_modules/@nodelib/fs.scandir": {
diff --git a/package.json b/package.json
index 6e17b7f2880..0ebc13c0208 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
   "devDependencies": {
     "@eslint/js": "^9.32.0",
     "@js-temporal/polyfill": "^0.5.1",
-    "@mdn/browser-compat-data": "^6.0.36",
+    "@mdn/browser-compat-data": "^6.0.37",
     "@octokit/rest": "^22.0.0",
     "@types/caniuse-lite": "^1.0.4",
     "@types/node": "^20.19.9",