diff --git a/css/properties/align-self.json b/css/properties/align-self.json
index e839d3ebb9fb6a..c90760c3144fd3 100644
--- a/css/properties/align-self.json
+++ b/css/properties/align-self.json
@@ -523,19 +523,25 @@
             ],
             "support": {
               "chrome": {
-                "version_added": "122"
+                "version_added": "122",
+                "partial_implementation": true,
+                "notes": "`align-self` only applies to absolutely positioned boxes when both insets on the appropriate axis are 0, for example `top` and `bottom`. See [bug 376097648](https://crbug.com/376097648)"
               },
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": "134"
+                "version_added": "134",
+                "partial_implementation": true,
+                "notes": "`align-self` only applies to absolutely positioned boxes when both insets on the appropriate axis are 0, for example `top` and `bottom`. See [bug 2026174](https://bugzil.la/2026174)"
               },
               "firefox_android": "mirror",
               "oculus": "mirror",
               "opera": "mirror",
               "opera_android": "mirror",
               "safari": {
-                "version_added": "26"
+                "version_added": "26",
+                "partial_implementation": true,
+                "notes": "`align-self` only applies to absolutely positioned boxes when both insets on the appropriate axis are 0, for example `top` and `bottom`."
               },
               "safari_ios": "mirror",
               "samsunginternet_android": "mirror",
diff --git a/css/properties/justify-self.json b/css/properties/justify-self.json
index 2a0e6064a61ae4..e7b43aa8df06e8 100644
--- a/css/properties/justify-self.json
+++ b/css/properties/justify-self.json
@@ -267,19 +267,25 @@
             ],
             "support": {
               "chrome": {
-                "version_added": "122"
+                "version_added": "122",
+                "partial_implementation": true,
+                "notes": "`justify-self` only applies to absolutely positioned boxes when both insets on the appropriate axis are 0, for example `left` and `right`. See [bug 376097648](https://crbug.com/376097648)"
               },
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": "134"
+                "version_added": "134",
+                "partial_implementation": true,
+                "notes": "`justify-self` only applies to absolutely positioned boxes when both insets on the appropriate axis are 0, for example `left` and `right`. See [bug 2026174](https://bugzil.la/2026174)"
               },
               "firefox_android": "mirror",
               "oculus": "mirror",
               "opera": "mirror",
               "opera_android": "mirror",
               "safari": {
-                "version_added": "26"
+                "version_added": "26",
+                "partial_implementation": true,
+                "notes": "`justify-self` only applies to absolutely positioned boxes when both insets on the appropriate axis are 0, for example `left` and `right`."
               },
               "safari_ios": "mirror",
               "samsunginternet_android": "mirror",
diff --git a/css/properties/place-self.json b/css/properties/place-self.json
index 7a9254400e62b6..b0317b136d7d90 100644
--- a/css/properties/place-self.json
+++ b/css/properties/place-self.json
@@ -148,19 +148,25 @@
             ],
             "support": {
               "chrome": {
-                "version_added": "122"
+                "version_added": "122",
+                "partial_implementation": true,
+                "notes": "`place-self` only applies to absolutely positioned boxes when both insets on the appropriate axis are 0, for example `top` and `bottom`. See [bug 376097648](https://crbug.com/376097648)"
               },
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": "134"
+                "version_added": "134",
+                "partial_implementation": true,
+                "notes": "`place-self` only applies to absolutely positioned boxes when both insets on the appropriate axis are 0, for example `top` and `bottom`. See [bug 2026174](https://bugzil.la/2026174)"
               },
               "firefox_android": "mirror",
               "oculus": "mirror",
               "opera": "mirror",
               "opera_android": "mirror",
               "safari": {
-                "version_added": "26"
+                "version_added": "26",
+                "partial_implementation": true,
+                "notes": "`place-self` only applies to absolutely positioned boxes when both insets on the appropriate axis are 0, for example `top` and `bottom`."
               },
               "safari_ios": "mirror",
               "samsunginternet_android": "mirror",