Inbox notifications is a notification extension for chrome. also, it is notifications extension. it's a free extension , it has 138 active users since released its first version, it earns an average rating of 5.00 from 2 rated user, last update is 3277 days ago.
https://github.com/dbalakov/inbox.notifications
You could download the latest version crx file or older version files and install it.
English.
You could find more help information from inbox notifications support page.
You could send emails to publisher, or check publisher's website.
More about manifest_file of inbox notifications.
You could click to report abuse of inbox notifications.