diff --git a/api/Window.json b/api/Window.json
index 08276fcbe217a8..de39fe4fcfe01b 100644
--- a/api/Window.json
+++ b/api/Window.json
@@ -907,6 +907,38 @@
           }
         }
       },
+      "credentialless": {
+        "__compat": {
+          "support": {
+            "chrome": {
+              "version_added": "110"
+            },
+            "chrome_android": "mirror",
+            "edge": "mirror",
+            "firefox": {
+              "version_added": false
+            },
+            "firefox_android": "mirror",
+            "ie": {
+              "version_added": false
+            },
+            "oculus": "mirror",
+            "opera": "mirror",
+            "opera_android": "mirror",
+            "safari": {
+              "version_added": false
+            },
+            "safari_ios": "mirror",
+            "samsunginternet_android": "mirror",
+            "webview_android": "mirror"
+          },
+          "status": {
+            "experimental": true,
+            "standard_track": false,
+            "deprecated": false
+          }
+        }
+      },
       "customElements": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/customElements",
diff --git a/html/elements/iframe.json b/html/elements/iframe.json
index 46e6ad43951c05..350624ddbb82db 100644
--- a/html/elements/iframe.json
+++ b/html/elements/iframe.json
@@ -237,6 +237,38 @@
             }
           }
         },
+        "credentialless": {
+          "__compat": {
+            "support": {
+              "chrome": {
+                "version_added": "110"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": false
+              },
+              "firefox_android": "mirror",
+              "ie": {
+                "version_added": false
+              },
+              "oculus": "mirror",
+              "opera": "mirror",
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": false
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror"
+            },
+            "status": {
+              "experimental": true,
+              "standard_track": false,
+              "deprecated": false
+            }
+          }
+        },
         "external_protocol_urls_blocked": {
           "__compat": {
             "description": "External protocol URLs blocked",