This will check for unread messages when using the Outlook Web App and put the unread count in the Outlook Web App tab.
I found myself annoyed by the Outlook Web App because one has to actually click on the OWA tab to see if you have any messages. With this extension, one can work in other tabs and know if they have any messages waiting for them or not.
This extension works with the OWA URL format https://*/owa/*
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