Launch Your Top Sites:
To open the top sites view, open FoxTab and select [My Top Sites] from the top bar.
To add pages to the top sites panel, just press the mouse right click button on the page you would like to add and click [Add to Top Sites].
While in top sites mode, on the bottom-left corner you can find the "Edit" button.
The edit mode let you rearrange the thumbnails using a simple drag and drop gestures. You can also set the size of the top sites panel.
To flip between the currently opened tabs, open FoxTab and select [Opened Tabs] from the top bar.
By clicking on a given thumbnail, the selected tab will be focused.
Recently Closed Tabs:
To view recently closed tabs, open FoxTab and select [Recently Closed Tabs] from the top bar.
By clicking on any thumbnail, the corresponding page will be reopened (use middle click to reopen in new tab).
FoxTab is highly customizable, you can:
✔ Change the launching keys.
✔ Set the size of the FoxTab panel to be small, medium, large, fit-to-browser or full-screen.
✔ Configure thumbnails to reflects tabs by page headers, by top-left area or according to your current location in the page.
✔ Switch between Landscape and Portrait previews.
For many additional tweaks, go to: Tools → Add-ons → FoxTab → Options.
Read more: http://www.foxtab.com/gettingstarted/