Notifier for Inbox™ is an add-on that opens the new Google Inbox in a separate popup window (or new tab), and brings badge notifications for all new emails. It uses gmail feed API for notifications.
Note: Notifier for Inbox™ is not related to Google or Inbox website/application at all. It is an unofficial add-on that is developed and maintained independently. The sole purpose of this add-on is to enhance using inbox.google.com.
More info: according to Google website(https://www.google.com/inbox/), Inbox by Gmail is a new app from the Gmail team. Inbox is an organized place to get things done and get back to what matters. Bundles keep emails organized. There also a YouTube video made by Google to introduce the new Inbox: https://www.youtube.com/watch?v=VCo3zZ0P4vU
Some key features of this add-on are as following:
a. Instant access to your new Google Mail Inbox (inbox.google.com) with just one click!
b. Notifies you every time you get a new email via Badge icon text.
c. Has a toolbar to enhance using your inbox.
d. Log-in just once to access your mailbox anytime (this add-on does not require any username or password).
e. Change panel size easily from add-on options page, there are also many other settings to adjust in the options page.
Note 1: for badge notifications to work properly, please open gmail in a new tab at-least once.
Note 2: in order to report bugs, please visit add-on homepage and fill the bug report form.