Add the number of unread stores to the Newsblur favicon.
I like to keep my Newsblur pinned in a tab, but then I don't know when I have unread stories... or how many. This plugin helps by overlaying the number of unread stories on the Newsblur favicon.
Note: for the add-on to work, you must turn on the "Show unread counts in the window title" option in your Newsblur preferences.