On the main dashboard, click on your lockrMail email address and select ‘Settings.’ Here, you can deselect ‘Pop Ups’ to completely disable the notifications from the Chrome extension regarding blocked emails from Senders. 

If you would like to keep the Chrome Extension notifications live, but just disable them on specific websites, toggle over to the Domains page and add the websites which you would like to disable notifications for. Once you type in the domain name, select your desired snooze time in the drop-down next to ‘Browser pop-up notifications.’ You can adjust this setting or unblock a domain at any time in the future. Note that you must have the Chrome Extension installed and be signed into your account within the extension in order for these settings to take effect.