See that little number in the bottom right-hand corner of this screenshot? Yep, that number tells you how many votes a recent DownloadSquad story got on Digg.

Smart Digg Button is a new Firefox extension using the recently released Digg API.

Once you install the extension, a little box shows up at the bottom of your browser window. If you're viewing a page that has not already been submitted to Digg, you'll have the option of submitting it yourself. If you visit a site that's already been dugg, you can see at a glance how many votes the page has received.

Other social bookmarking sites including Furl, Reddit, and StumbleUpon have their own Firefox add-ons that serve a similar role. But now you can have the complete set.

[via lifehacker]