Maximizing of window is uncomfortable. So, in inner (so to speak) window the combination Ctrl-W closes all opened tabs.
Also I like AB for possibility to use the different languages in address bar and page without language switching. This feature in new inner window doesn't work.
There are other bugs in new version AB also - white page after full-windowed video, content in new tab doesn't scaled... IMHO, this version is very crooked.
