I just installed the
It's a cool little Extension that displays your AdSense stats at the bottom of your Firefox browser window.
Currently it shows your Page impressions, Clicks, Page CTR, Page eCPM & Your earnings.
It can't show Ad unit impressions instead of Page impressions, and it can't show your channel stats, but other than that it's working fine.
I'm not as addicted to continously checking my stats as I used to be, but maybe there are a few additional hours per day that can be used for other more productive purposes now