Firefox recognizes Server-Timing header, but only partially supports …

…it as Trailer (DevTools only) chore(http): Clarify Trailer support, partial support for Server-Timing in Fx devtools only
mdn · Nov 22, 2024 · af6c908 · af6c908
1 parent 323a517
commit af6c908
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Showing 2 changed files with 43 additions and 7 deletions.
diff --git a/http/headers/Server-Timing.json b/http/headers/Server-Timing.json
@@ -39,6 +39,42 @@
             "standard_track": true,
             "deprecated": false
           }
+        },
+        "trailer": {
+          "__compat": {
+            "description": "`Server-Timing` as HTTP trailer",
+            "support": {
+              "chrome": {
+                "version_added": false,
+                "impl_url": "https://crbug.com/40811358"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "71",
+                "notes": "Only the `Server-Timing` header is a recognized trailer, and it is only exposed to DevTools in the network Timing tab ([bug 1403051](https://bugzil.la/1403051)). Developers cannot access trailers via the Fetch API or XHR."
+              },
+              "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",
+              "webview_ios": "mirror"
+            },
+            "status": {
+              "experimental": false,
+              "standard_track": true,
+              "deprecated": false
+            }
+          }
         }
       }
     }

diff --git a/http/headers/Trailer.json b/http/headers/Trailer.json
@@ -10,24 +10,24 @@
           ],
           "support": {
             "chrome": {
-              "version_added": "1"
+              "version_added": false
             },
             "chrome_android": "mirror",
-            "edge": {
-              "version_added": "12"
-            },
+            "edge": "mirror",
             "firefox": {
-              "version_added": "1"
+              "version_added": "71",
+              "partial_implementation": true,
+              "notes": "Only the `Server-Timing` header is a recognized trailer, and it is only exposed to DevTools in the network Timing tab ([bug 1403051](https://bugzil.la/1403051)). Developers cannot access trailers via the Fetch API or XHR."
             },
             "firefox_android": "mirror",
             "ie": {
-              "version_added": "≤11"
+              "version_added": false
             },
             "oculus": "mirror",
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
-              "version_added": "1"
+              "version_added": false
             },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",