diff --git a/api/WebTransport.json b/api/WebTransport.json
index 314b666cb5b025..049ccf3b01ddff 100644
--- a/api/WebTransport.json
+++ b/api/WebTransport.json
@@ -186,7 +186,7 @@
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": false
+                "version_added": "125"
               },
               "firefox_android": "mirror",
               "ie": {