I know you were all devastated when the redesign meant the disappearance of Snap link previews, so I’m sure you’ll be overcome with joy to see that they’re back. I’ve gone for a less intrusive option than before, though: to see a preview you’ll need to mouseover the Snap icon next to a link. If you don’t do that, you won’t get the preview.

If you really don’t like them you can disable Snap altogether by clicking on the options link at the top right of a preview window. I’d imagine it uses cookies, or something.