diff --git a/webextensions/api/storage.json b/webextensions/api/storage.json
index 779d1e60c18865..29fa4cc33ad15e 100644
--- a/webextensions/api/storage.json
+++ b/webextensions/api/storage.json
@@ -322,11 +322,15 @@
               "support": {
                 "chrome": {
                   "version_added": "96",
-                  "notes": "Only supported for the session storage area."
+                  "notes": [
+                    "Supported by the `session` storage area from Chrome 96.",
+                    "Supported by all storage areas from Chrome 140."
+                  ]
                 },
                 "edge": "mirror",
                 "firefox": {
-                  "version_added": false
+                  "version_added": false,
+                  "impl_url": "https://bugzil.la/1724754"
                 },
                 "firefox_android": "mirror",
                 "opera": "mirror",