diff --git a/what-to-do.md b/what-to-do.md
index 42739ff9..de58f0ff 100644
--- a/what-to-do.md
+++ b/what-to-do.md
@@ -74,7 +74,9 @@ If Cloudflare leak your information, it's not our fault. [*]
 | [Third-party Request Blocker (AMO)](https://addons.mozilla.org/en-US/firefox/addon/tprb/) | Searxes #Addon | [Link](https://searxes.danwin1210.me/) | **Yes**     | **Yes**     |
 | [TPRB](https://searxes.danwin1210.me/collab/tprb0/get_tprb0.php) | Sw | [Link](http://searxes.nmqnkngye4ct7bgss4bmv5ca3wpa55yugvxen5kz2bbq67lwy6ps54yd.onion/collab/___go.php?go=sw) | **Yes**     | **Yes**     |
 | [Detect Cloudflare](https://addons.mozilla.org/en-US/firefox/addon/detect-cloudflare/) | Frank Otto | [Link](https://github.com/traktofon/cf-detect) | No     | **Yes**     |
-| [Cloud Firewall](https://addons.mozilla.org/en-US/firefox/addon/cloud-firewall/) | Gokulakrishna Sudharsan | [Link](https://gitlab.com/gkrishnaks/cloud-firewall/blob/master/README.md) | Yes | No |
+| [Cloud Firewall](https://addons.mozilla.org/en-US/firefox/addon/cloud-firewall/) [*] | Gokulakrishna Sudharsan | [Link](https://gitlab.com/gkrishnaks/cloud-firewall/) | Yes | No |
+
+[*] Do not use it if you're using proxy/VPN/Tor because it has "[DNS leak](https://en.wikipedia.org/wiki/DNS_leak)".
 
 - Convince your friends to use [Tor Browser](https://www.torproject.org/) on the daily basis. Anonymity should be the standard of the open internet!