I thought the browser tab thing was an urban legend, but it turns out they're there, and probably agnostic to the HTML engine. Last item in the dropdown menu is "Advanced,"where you choose the browser engine, and among its (new?) entries is "View" with options for tab, box and window. However, in tab mode the tabs are placed on the left side of the screen, eating valuable layout space. There also is a "policy" choice that lets you control Javascript for Google separately from the global settings.
