If you have a site open in a tab in Safari and you want to move the page to be in its own browser window instead of a tab, this is really easy to do in Safari. Just click on the tab and drag it down to the main part of the browser window. When you do this, the tab image will change to look like a browser window. Let go of the mouse button and this tab will then be removed from the current window and a new window will be opened with the site that was in the tab now in the new window. Saves some copy-and-paste and some clicks when you want to move a tab into a new window.