diff --git a/docs/documentation/sitespeed.io/s3/index.md b/docs/documentation/sitespeed.io/s3/index.md
index 0297974eeb..152abfa953 100644
--- a/docs/documentation/sitespeed.io/s3/index.md
+++ b/docs/documentation/sitespeed.io/s3/index.md
@@ -27,6 +27,7 @@ To setup a bucket on S3 you need to have a Amazon account.
 * [Configure your bucket for static website hosting]( 
 https://docs.aws.amazon.com/AmazonS3/latest/user-guide/static-website-hosting.html) - so that you can access the result pages and make sure you add a bucket policy (for access).
 * [Add a lifecycle rule](https://docs.aws.amazon.com/AmazonS3/latest/user-guide/create-lifecycle.html) - you want to make sure you remove old result pages/videos/screenshots to save money.
+* If you want to show screenshots/videos/use the meta data from S3 in Grafana, you need to make sure that your Grafana instance can access S3 through your browser by setting up correct [CORS](https://docs.aws.amazon.com/AmazonS3/latest/userguide/cors.html).
 
 Do you need more help? First dive into the [AWS S3 docs](https://docs.aws.amazon.com/AmazonS3/latest/gsg/GetStartedWithS3.html) then if it doesn't help, [create an issue](https://github.com/sitespeedio/sitespeed.io/issues/new) and we can try to help you.