diff --git a/api/HTMLTemplateElement.json b/api/HTMLTemplateElement.json
index b9a1a1e6ca9adc..e58370c0d72601 100644
--- a/api/HTMLTemplateElement.json
+++ b/api/HTMLTemplateElement.json
@@ -81,7 +81,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "122"
+              "version_added": "preview"
             },
             "firefox_android": "mirror",
             "ie": {
diff --git a/html/elements/template.json b/html/elements/template.json
index 095e7285421f26..89838c399469e4 100644
--- a/html/elements/template.json
+++ b/html/elements/template.json
@@ -54,7 +54,7 @@
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": "122"
+                "version_added": "preview"
               },
               "firefox_android": "mirror",
               "ie": {