When Reveal was reviewed a while back, the extension was immediately inserted into my extension pile, but since using Showcase, Reveal may be uninstalled soon.
The extension almost provides the same functionality as Reveal except for the following differences:
- More preferences and customization.
- Icons and Title are placed at the top, making the previews look like actual windows.
- Middle-Click and Hold allows zooming in on the thumbnail.
The Showcase Firefox extension takes an existing extension and makes it better. I'm waiting for the next extension developer to do one better than this one, but if you currently are using Reveal (like I am), consider looking into this extension to replace Reveal.