diff --git a/css/properties/align-self.json b/css/properties/align-self.json
index e839d3ebb9fb6a..4c2873589276c9 100644
--- a/css/properties/align-self.json
+++ b/css/properties/align-self.json
@@ -523,19 +523,26 @@
             ],
             "support": {
               "chrome": {
-                "version_added": "122"
+                "version_added": "122",
+                "partial_implementation": true,
+                "notes": "If `inset: auto` applies to the element, then … . See [bug 376097648](https://crbug.com/376097648)"
               },
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": "134"
+                "version_added": "134",
+                "impl_url": "https://bugzil.la/2026174",
+                "partial_implementation": true,
+                "notes": "Only works when the element has a non-auto inset."
               },
               "firefox_android": "mirror",
               "oculus": "mirror",
               "opera": "mirror",
               "opera_android": "mirror",
               "safari": {
-                "version_added": "26"
+                "version_added": "26",
+                "partial_implementation": true,
+                "notes": "Only works when the element has a non-auto inset."
               },
               "safari_ios": "mirror",
               "samsunginternet_android": "mirror",
diff --git a/css/properties/justify-self.json b/css/properties/justify-self.json
index 2a0e6064a61ae4..f7e87ba9bbca53 100644
--- a/css/properties/justify-self.json
+++ b/css/properties/justify-self.json
@@ -267,19 +267,27 @@
             ],
             "support": {
               "chrome": {
-                "version_added": "122"
+                "version_added": "122",
+                "impl_url": "https://crbug.com/376097648",
+                "partial_implementation": true,
+                "notes": "Only works when the element has a non-auto inset."
               },
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": "134"
+                "version_added": "134",
+                "impl_url": "https://bugzil.la/2026174",
+                "partial_implementation": true,
+                "notes": "Only works when the element has a non-auto inset."
               },
               "firefox_android": "mirror",
               "oculus": "mirror",
               "opera": "mirror",
               "opera_android": "mirror",
               "safari": {
-                "version_added": "26"
+                "version_added": "26",
+                "partial_implementation": true,
+                "notes": "Only works when the element has a non-auto inset."
               },
               "safari_ios": "mirror",
               "samsunginternet_android": "mirror",
diff --git a/css/properties/place-self.json b/css/properties/place-self.json
index 7a9254400e62b6..e6870330bf43c0 100644
--- a/css/properties/place-self.json
+++ b/css/properties/place-self.json
@@ -148,19 +148,27 @@
             ],
             "support": {
               "chrome": {
-                "version_added": "122"
+                "version_added": "122",
+                "impl_url": "https://crbug.com/376097648",
+                "partial_implementation": true,
+                "notes": "Only works when the element has a non-auto inset."
               },
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": "134"
+                "version_added": "134",
+                "impl_url": "https://bugzil.la/2026174",
+                "partial_implementation": true,
+                "notes": "Only works when the element has a non-auto inset."
               },
               "firefox_android": "mirror",
               "oculus": "mirror",
               "opera": "mirror",
               "opera_android": "mirror",
               "safari": {
-                "version_added": "26"
+                "version_added": "26",
+                "partial_implementation": true,
+                "notes": "Only works when the element has a non-auto inset."
               },
               "safari_ios": "mirror",
               "samsunginternet_android": "mirror",