diff --git a/ADBLOCKING.md b/ADBLOCKING.md
index 936fbce1..9e7a1d82 100644
--- a/ADBLOCKING.md
+++ b/ADBLOCKING.md
@@ -30,6 +30,8 @@ Note that:
 * applications, like web browsers, may cache data, so you may 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, Puffin, Chrome w/ data saver, UC Browser, Yandex w/ Turbo, Apus Browser, KK Browser, Onavo Extend, Maxthon) will not have ads blocked as NetGuard cannot see those domain requests
 * applications, browsers mostly, can have a private DNS feature (Chrome: three-dots menu, Settings, Privacy, Use secure DNS, turn off)
+* applications, including browser, can be system apps, which require managing system apps in the advanced settings to be enabled
+* the Android always-on VPN setting *Block connections without VPN* will result in stop sending domain names to the VPN after some time
 * YouTube ads are not domain-based, and thus cannot be blocked with NetGuard
 * NetGuard ignores the IP addresses in the hosts file, because it does not route blocked domains to localhost
 * When NetGuard imports the hosts file, it automatically discards any duplicates entries, so duplicate entries are not a problem and have no performance impact after the file is imported
diff --git a/README.md b/README.md
index d8519ffc..6e1db8fd 100644
--- a/README.md
+++ b/README.md
@@ -83,7 +83,7 @@ See also [this FAQ](https://github.com/M66B/NetGuard/blob/master/FAQ.md#user-con
 
 NetGuard can be used on rooted devices too and even offers more features than most root firewalls.
 
-Some Android versions, especially Samsung's Android versions, have a buggy VPN implementation,
+Some older Android versions, especially Samsung's Android versions, have a buggy VPN implementation,
 which results in Android refusing to start the VPN service in certain circumstances,
 like when there is no internet connectivity yet (when starting up your device)
 or when incorrectly requiring manual approval of the VPN service again (when starting up your device).