It is possible that you move the mouse a little bit downwards while clicking the tab and that can cause the tab to get detached and opened in a new window. Firefox 3.5 versions and later have a feature called tear-off tabs. You can detach a tab from the current window and open it in a new window by dragging a tab in the browser window. You can drag that tab back to the tab bar in the original window to undo that detaching.

Not wanting to rain on anyone's parade, but a word of warning for the unwary. Sounds great doesn't it? 10 different cultivars on one understock. Can I let you in on some practical aspects of these offers, made to entice those who often know little better than to part with their money. It is usual to put 2 buds onto a standard understock. One, to give a bit of insurance should one bud not take, and two, to provide a balanced head, given that the buds are implanted on opposite sides of the stock, one slightly below the other. Usually both take and to begin with we have an acceptably robust plant. However after a few years one of the scions (usually the lower) does better than the other, which eventually dies. The lower scion gradually expands to enclose the entire head of the understock, in effect starving the upper scion of nourishment, and it dies. Very rarely is it the other way around. If you apply this logic to stock budded up with 10 cultivars, it follows that in 10 years you will have a 3' standard of the lowest budded cultivar. In addition to this, the cultivars mentioned are not vigorous enough to make a balanced plant at 6' height. They do have names of popular and reliable cultivars to lure the punters. Iceberg and Bonica are OK at tops 4' height understocks, while 6' understocks are usually reserved for the weeping or procumbent cultivars, to give that much larger, weeping and/or umbrella form. Hey, but in the end it's your money.

It looks like pebble dash stucco on a fiberglass mesh reinforcement. The mesh is also to help give the stucco something to grip to. Behind that it looks like styrofoam.

Have you reached out to the designer? Destin Barkley, senior interior designer at D’Asign Source. https://www.oceanhomemag.com/home-design/family-retreat-in-the-florida-keys-offers-a-resort-like-escape/