From de177f13d92ba303d1d76ede5e2a9dbf94bbe107 Mon Sep 17 00:00:00 2001
From: Florian Scholz <fs@florianscholz.com>
Date: Fri, 5 Jun 2026 17:26:15 +0200
Subject: [PATCH 1/2] WebTransport renamed datagram buffer properties

---
 api/WebTransportDatagramDuplexStream.json | 50 +++++++++++++++--------
 1 file changed, 32 insertions(+), 18 deletions(-)

diff --git a/api/WebTransportDatagramDuplexStream.json b/api/WebTransportDatagramDuplexStream.json
index aac155163a8d9b..b5c4e2b2644ac2 100644
--- a/api/WebTransportDatagramDuplexStream.json
+++ b/api/WebTransportDatagramDuplexStream.json
@@ -118,10 +118,10 @@
           }
         }
       },
-      "incomingHighWaterMark": {
+      "incomingMaxAge": {
         "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebTransportDatagramDuplexStream/incomingHighWaterMark",
-          "spec_url": "https://w3c.github.io/webtransport/#dom-webtransportdatagramduplexstream-incominghighwatermark",
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebTransportDatagramDuplexStream/incomingMaxAge",
+          "spec_url": "https://w3c.github.io/webtransport/#dom-webtransportdatagramduplexstream-incomingmaxage",
           "tags": [
             "web-features:webtransport"
           ],
@@ -162,15 +162,15 @@
           }
         }
       },
-      "incomingMaxAge": {
+      "incomingMaxBufferedDatagrams": {
         "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebTransportDatagramDuplexStream/incomingMaxAge",
-          "spec_url": "https://w3c.github.io/webtransport/#dom-webtransportdatagramduplexstream-incomingmaxage",
+          "spec_url": "https://w3c.github.io/webtransport/#dom-webtransportdatagramduplexstream-incomingmaxbuffereddatagrams",
           "tags": [
             "web-features:webtransport"
           ],
           "support": {
             "chrome": {
+              "alternative_name": "incomingHighWaterMark",
               "version_added": "97"
             },
             "chrome_android": "mirror",
@@ -184,14 +184,21 @@
               ]
             },
             "edge": "mirror",
-            "firefox": {
-              "version_added": "114"
-            },
+            "firefox": [
+              {
+                "version_added": "152"
+              },
+              {
+                "alternative_name": "incomingHighWaterMark",
+                "version_added": "114"
+              }
+            ],
             "firefox_android": "mirror",
             "oculus": "mirror",
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
+              "alternative_name": "incomingHighWaterMark",
               "version_added": "26.4"
             },
             "safari_ios": "mirror",
@@ -250,10 +257,10 @@
           }
         }
       },
-      "outgoingHighWaterMark": {
+      "outgoingMaxAge": {
         "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebTransportDatagramDuplexStream/outgoingHighWaterMark",
-          "spec_url": "https://w3c.github.io/webtransport/#dom-webtransportdatagramduplexstream-outgoinghighwatermark",
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebTransportDatagramDuplexStream/outgoingMaxAge",
+          "spec_url": "https://w3c.github.io/webtransport/#dom-webtransportdatagramduplexstream-outgoingmaxage",
           "tags": [
             "web-features:webtransport"
           ],
@@ -294,15 +301,15 @@
           }
         }
       },
-      "outgoingMaxAge": {
+      "outgoingMaxBufferedDatagrams": {
         "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WebTransportDatagramDuplexStream/outgoingMaxAge",
-          "spec_url": "https://w3c.github.io/webtransport/#dom-webtransportdatagramduplexstream-outgoingmaxage",
+          "spec_url": "https://w3c.github.io/webtransport/#dom-webtransportdatagramduplexstream-outgoingmaxbuffereddatagrams",
           "tags": [
             "web-features:webtransport"
           ],
           "support": {
             "chrome": {
+              "alternative_name": "outgoingHighWaterMark",
               "version_added": "97"
             },
             "chrome_android": "mirror",
@@ -316,14 +323,21 @@
               ]
             },
             "edge": "mirror",
-            "firefox": {
-              "version_added": "114"
-            },
+            "firefox": [
+              {
+                "version_added": "152"
+              },
+              {
+                "alternative_name": "outgoingHighWaterMark",
+                "version_added": "114"
+              }
+            ],
             "firefox_android": "mirror",
             "oculus": "mirror",
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
+              "alternative_name": "outgoingHighWaterMark",
               "version_added": "26.4"
             },
             "safari_ios": "mirror",

From 7d90ba1217b01f33cb439cef7ac6f5ca28e48867 Mon Sep 17 00:00:00 2001
From: Florian Scholz <fs@florianscholz.com>
Date: Fri, 5 Jun 2026 17:34:42 +0200
Subject: [PATCH 2/2] Firefox doesn't rename this yet

---
 api/WebTransportDatagramDuplexStream.json | 26 +++++++----------------
 1 file changed, 8 insertions(+), 18 deletions(-)

diff --git a/api/WebTransportDatagramDuplexStream.json b/api/WebTransportDatagramDuplexStream.json
index b5c4e2b2644ac2..7b0a43bf3bd88a 100644
--- a/api/WebTransportDatagramDuplexStream.json
+++ b/api/WebTransportDatagramDuplexStream.json
@@ -184,15 +184,10 @@
               ]
             },
             "edge": "mirror",
-            "firefox": [
-              {
-                "version_added": "152"
-              },
-              {
-                "alternative_name": "incomingHighWaterMark",
-                "version_added": "114"
-              }
-            ],
+            "firefox": {
+              "alternative_name": "incomingHighWaterMark",
+              "version_added": "114"
+            },
             "firefox_android": "mirror",
             "oculus": "mirror",
             "opera": "mirror",
@@ -323,15 +318,10 @@
               ]
             },
             "edge": "mirror",
-            "firefox": [
-              {
-                "version_added": "152"
-              },
-              {
-                "alternative_name": "outgoingHighWaterMark",
-                "version_added": "114"
-              }
-            ],
+            "firefox": {
+              "alternative_name": "outgoingHighWaterMark",
+              "version_added": "114"
+            },
             "firefox_android": "mirror",
             "oculus": "mirror",
             "opera": "mirror",