Update README.md regarding #245

README.md

@@ -122,6 +122,7 @@ make package
 - Entitlements from the guest app are not applied to the host app. This isn't a big deal since sideloaded apps requires only basic entitlements.
 - App Permissions are globally applied.
 - Guest app containers are not sandboxed. This means one guest app can access other guest apps' data.
+- App extensions aren't supported. they cannot be registered because: LiveContainer is sandboxed, SpringBoard doesn't know what apps are installed in LiveContainer, and they take up App ID.
 - Only one guest app can run at a time. This is much more like 3 apps limit where you have to disable an app to run another (switching between app in LiveContainer is instant).
 - Remote push notification might not work. ~~If you have a paid developer account then you don't even have to use LiveContainer~~
 - Querying custom URL schemes might not work(?)