diff --git a/api/Window.json b/api/Window.json
index 7fb9933bad74e5..fdfc7ceacd6e45 100644
--- a/api/Window.json
+++ b/api/Window.json
@@ -4132,12 +4132,24 @@
             "edge": {
               "version_added": "12"
             },
-            "firefox": {
-              "version_added": "1"
-            },
-            "firefox_android": {
-              "version_added": "4"
-            },
+            "firefox": [
+              {
+                "version_added": "1"
+              },
+              {
+                "version_added": "91",
+                "alternative_name": "clientInformation"
+              }
+            ],
+            "firefox_android": [
+              {
+                "version_added": "4"
+              },
+              {
+                "version_added": "91",
+                "alternative_name": "clientInformation"
+              }
+            ],
             "ie": {
               "version_added": "4"
             },