diff --git a/Cloud-storage.md b/Cloud-storage.md
index 6df4938..d6b666a 100644
--- a/Cloud-storage.md
+++ b/Cloud-storage.md
@@ -31,7 +31,8 @@ Cloud storage services offered by specific browser vendors have their own limita
 ##### Firefox browsers
 
 - I have observed that too large amount of data will cause a warning in the browser console (> 8K).
-- <https://discourse.mozilla-community.org/t/how-to-sync-preferences-of-a-bootstrapped-extension-via-sync/3024>.
-    - There is not much doc about this for Firefox, so there might be undocumented limitations yet to be found.
+- A new installation of uBlock Origin will cause cloud storage data to be blanked.
+    - See: <https://discourse.mozilla-community.org/t/how-to-sync-preferences-of-a-bootstrapped-extension-via-sync/3024>.
+- There is not much doc about this for Firefox, so there might be undocumented limitations yet to be found.
 - Other Firefox-related platform:
     - I have no clue whether this new feature will work for other browser vendors.
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