If you are an administrator on an institutional Caption.Ed site license, here's how you can block users from using the browser extension to caption content hosted on certain domains.

First, log in to your Caption.Ed dashboard.

Select "Settings" on the left-hand menu, then select "Institutional Admin".

Scroll down the page till you see the "Captioning Source control" menu.

Select "Add new" at the bottom of the menu.

Enter the URL of the website you wish to block (e.g. www.netflix.com).

Click "Save" to confirm the change.