it's called Sparky, funny heh L:)
- Sparky is an Alexa Toolbar made for Firefox. Instantly get Alexa information about any site on the Web with Sparky.
- Related Links: Find sites that are similar to the one you are currently visiting. (not sure that's is usable, like g00gle "I feel liky" just to dev. plays)
- Traffic Trend: A sparkline showing the traffic trend from the last four months. (nice graph not more :)
- Reach Meter: A neat little indicator that shows the site's Reach. (well accuracy is still the same)
- Traffic Rank: Shows the current site's Alexa Traffic Rank. (really good to impess your girlfriend at the party LOL :)
Anyway, don't install it if you don't want to know it by yourself.
Picture is worst of thousand words:
(click to enlarge it :)