AdSense Notifier

https://addons.mozilla.org/en-US/firefox/addon/500
The AdSense Notifier is for those who use the Firefox browser instead of
Internet Explorer. The Notifier is an add-on that shows your AdSense stats
on the status bar of your browser and updates those stats automatically.
To install the Notifier, go to the Web address in the beginning of this section
and click Install Now. A software installation dialog box pops up. Allow
the dialog box to load completely and then click Install Now. The installation
takes a few seconds and then you’re prompted to restart your Firefox
browser. Select Restart Now, and the browser closes and then re-opens.
You’re logged in automatically, and your stats display in the bottom-right
corner of the browser.