It has taken a long while, but finally, Mozilla is bringing a more helpful and lively new tab page to replace the current blank page you normally get.
It has been available in Nightly releases for a few weeks now, but it has been turned on for a week onthe Aurora channel so more users can provide feedback.
Initially you get a set of Firefox recommendations based on your most frequently and recently visited pages. You won’t get a thumbnail until you actually click on one of them. Somehow I couldn’t get a thumbnail for my local bank or twitter no matter how many times I clicked on the thumbnails, but this is part of the bug hunting at this stage.
You can reorder, pin or remove (and undo) a thumbnail. You can also drag a bookmark to a thumbnail position to add it to the new tab page, though it is not discoverable at all. I just tried for good and it worked.
There is no option to rename the thumbnail or add more items to the page, but the whole idea is to make this a simple unbotrusive feature. New tab backgrounds are also under consideration but there is no ETA, so don’t hold your breath.
For a do-it-all new tab page, I recommend New Tab King.