Alert for Gmail
Alert for Gmail is a Chrome extension that notifies you for any new emails that are in your inbox without having the need to constantly check your inbox. When a new email arrives in your inbox this extension gives you a notification where you can view the message.
Also Alert offers many other features such as viewing the email in your inbox, deleting and marking the email as read. Alert also supports many accounts at once. Also if you are on your desktop Alert will send you a notification there too.
Alert features a dark mode interface so it's easier to look at the messages you recieve.