Sparky Web Rank Toolbar for Firefox from Alexa

Alexa, the company which provides the website ranking depending on the traffic to each web sites, has launched its toolbar for Firefox web browser named Sparky. Its not just a toolbar, its some thing more than that.
Sparky will provide comprehensive traffic details about the web site you are browsing. They are providing details like

• Related Links: Find sites that are similar to the one you are currently visiting.
• Traffic Trend: A spark line showing the traffic trend from the last four months.
• Reach Meter: A neat little indicator that shows the site’s Reach.
• Traffic Rank: Shows the current site’s Alexa Traffic Rank.

But, my personal opinion is that, this add-on is not at all useful to a common surfer. He can just see the site rank thats all. This may be useful to a blogger who want to analyze the current traffic scenarios of his and his competitive web sites.
Above all, Alexa is going get benefited as it can collect the user information about a wider community using Firefox alone, they may use this information for their future business diversions.!!!
Quote: Nothing will happen in this world, without a reason. [Install Sparky ]