diff --git a/ADBLOCKING.md b/ADBLOCKING.md
index 7e15307c..ddaef880 100644
--- a/ADBLOCKING.md
+++ b/ADBLOCKING.md
@@ -15,6 +15,7 @@ Instructions:
 Note that:
 
 * applications, like the browser, may cache data, so you might need to clear caches
+* applications, browsers mostly, that have a *"data saver"* like feature that proxies requests through their servers (eg. Opera w/ Turbo, Opera Max app, Puffin, Chrome w/ data saver, UC Browser, Yandex w/ Turbo, Apus Browser, KK Browser, Onavo Extend, Maxthon) will not have ads blocked as NetGuard can't even see those domain requests
 * the test page only works using the hosts file downloaded from [here](http://www.netguard.me/hosts) (the default)
 * YouTube ads are not domain based and cannot be blocked
 * **ad blocking is not available when NetGuard was installed from the Play store!**