Firefox: What we liked
On a tablet with 1280-by-800 screen resolution, and when you hold the device in landscape orientation, the numbered button is set to the left of the URL entry box. Tap it and the tab preview panel appears as a column along the left of the browser window. You can switch between viewing a site as it would appear on a standard desktop web browser, or its mobile version. This can be handy if you’d rather not be forced to see a mobile version of a site that might not be as easy to use or which lacks the features found in its original full-size version.