Tab Scope is one among those innovation Firefox extensions, which tries to improve our browsing experience and make us more productive. This extension adds real time thumbnail preview to tabs, and does it better than any other extension I’ve seen so far. Whenever you hover your cursor over tabs, it’ll show up small thumbnail of the page. It’s quite similar to the real-time preview seen in Vista’s task bar, but with extra functionalities which let you control that page.
You can navigate forward and backward, stop the page from loading, enlarge the thumbnail preview or even close the tab right from the real-time preview itself. All these can be done using simple six buttons located just over the preview.
Plus more, you can actually click on links and buttons available on the page from the preview itself. The extension also allows you to change the dimensions of the real-time preview from the options menu. I read about this extension here. Ryan was right; this extension is indeed an awesome productivity booster!