I'm very like to answer questions on stackoverflow, but also I like to pin tabs in browser. It's hard to check how many unread questions I have on my favorite tag, so I decide to write script that will show unread questions counter in favicon.
Should work in Google Chrome, Mozilla Firefox (with installed Greasemonkey extension) and Opera and others browsers that supports user scripts.
More about installation info at
scripts wiki tag.
See my profile at stackoverflow for contact details.