This is not an extensive review, for I'm sure there better ones around. I appreciate the work that has been done on new features and on consolidating old ones, but I will concentrate on one of them only. First of all, however, a brief remark about the new "resume browsing section" feature: nice, but I would love not to have to test it so often! Also, it does restore windows, and tabs (I don't know downloads, although it is claimed to) but not text written in forms, well, at least not in textareas, and that can be annoying. However I'm aware that the frequent crashes may be due to my particular system, and I'm positive that any problem will be solved in the next minor releases.
Now, let's come to the main point that I want to discuss, which is, in view of my interest for interfaces, the new tabbed browsing system. Actually, I'm not really sure whether to consider it as an improvement...
Generally I'm a supporter of KISS all the time. In this case consider what we had before: any number of tabs displayed simultaneously, that could shrink arbitrarily. Now we have left and right arrows to scroll while viewing a limited number of them at once. Which scheme is simpler? I'm half hearted: with the previous one, one had an intuitive idea of how many were open, but indeed things could get quite messy. (I occasionally open 30 or more!) With the new one, things are certainly more ordered under any circumstance.
What I still consider not to be an improvement is the choice of having a close button per tab. First of all it makes the visual appearance heavier, notwithstanding the fact that it's shaded (depending on the chosen theme, I guess, but most will do, I also guess) in inactive tabs. Second, and more important, previously one used to have a single close button in a fixed position, now the position changes with the frame one is actually viewing. I suppose it's all a matter of getting used to any of these choices, but in any case I cosider the current one to be conceptually more complex while buying one nothing, and overloading each tag. I wish at least there were an option to choose between the old and the new behaviour.
Last, recently closed tabs in history are a great tool, of course!