On the main dashboard, click on your lockrMail email address and select ‘Settings.’ Here, you can toggle off ‘Pop Ups’ under the Chrome Extension section to completely disable the pop-up notifications from the browser extension. 

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, you will have the ability to set ‘Browser pop-up notifications’ for that domain either to off. You can adjust this setting to on or to your global default 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.