diff --git a/webextensions/api/browsingData.json b/webextensions/api/browsingData.json
index 6011b0c958f9c5..ef7ed569683a2a 100644
--- a/webextensions/api/browsingData.json
+++ b/webextensions/api/browsingData.json
@@ -536,12 +536,18 @@
               "edge": "mirror",
               "firefox": {
                 "version_added": "53",
-                "notes": "Specifying `dataTypes.history` will also remove download history and service workers."
+                "notes": [
+                  "Specifying `dataTypes.history` also removes download history and service workers.",
+                  "Specifying `dataTypes.localStorage` also remove [session storage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) from Firefox 146."
+                ]
               },
               "firefox_android": [
                 {
                   "version_added": "85",
-                  "notes": "Specifying `dataTypes.history` will also remove download history and service workers."
+                  "notes": [
+                    "Specifying `dataTypes.history` also removes download history and service workers.",
+                    "Specifying `dataTypes.localStorage` also remove [session storage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) from Firefox 146."
+                  ]
                 },
                 {
                   "version_added": "57",
@@ -695,11 +701,17 @@
               "edge": "mirror",
               "firefox": {
                 "version_added": "57",
-                "notes": "`removalOptions.since` is not supported."
+                "notes": [
+                  "`removalOptions.since` is not supported.",
+                  "Also removes [session storage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) from Firefox 146."
+                ]
               },
               "firefox_android": {
                 "version_added": "85",
-                "notes": "`removalOptions.since` is not supported."
+                "notes": [
+                  "`removalOptions.since` is not supported.",
+                  "Also removes [session storage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) from Firefox 146."
+                ]
               },
               "opera": "mirror",
               "safari": {