Aside from wasting huge amounts of screen space compared to the old version and being a tabletised Windows 8 mess where they have to put text on the screen to tell you where to type because putting boxes around text fields is so old-fashioned, it also makes Firefox suck up 50% of the CPU on Ubuntu. I’d noticed the laptop was running hot and ‘top’ showed 50% CPU usage in Firefox, but no window seemed to be doing anything that would use up a lot of CPU, like playing animated ads. Eventually, after closing tab after tab, I closed the one to hotmail, and, lo, the CPU usage vanished.
I’ve no idea what the stupid site is doing, but just leaving the inbox window open seems to cause massive CPU usage. Fortunately I hardly use hotmail any more, so I can just open it when I have to, but it’s another example of the horrors of Windows 8.