diff --git a/api/Notification.json b/api/Notification.json
index 7b91e810a82831..639fd8b1338ef2 100644
--- a/api/Notification.json
+++ b/api/Notification.json
@@ -843,9 +843,15 @@
             "edge": {
               "version_added": "18"
             },
-            "firefox": {
-              "version_added": "138"
-            },
+            "firefox": [
+              {
+                "version_added": "preview"
+              },
+              {
+                "version_added": "138",
+                "version_removed": "140"
+              }
+            ],
             "firefox_android": "mirror",
             "ie": {
               "version_added": false
@@ -865,7 +871,7 @@
             "webview_ios": "mirror"
           },
           "status": {
-            "experimental": false,
+            "experimental": true,
             "standard_track": true,
             "deprecated": false
           }