Of course Chrome for Windows is the fastest, the Windows version of Safari sucks. Like OS, like browser.
CMD-Z?
I just tried it, and it doesn't work for some reasonalthough cmd-z does the job(honestly, I'm not sure if it's a default command or came with glims) there are plenty of missing 'peanuts' which makes you wonder if apple engineers are really focused on the customer's needs
if every amateur developer can build an addon which enables such features, why does apple refuse to do so??