I use Firefox on my Windows 8.1 machine because it won't run Chrome well for some reason. Webpages don't display properly, get connection errors etc.
I can switch between Safari and Chrome on the Mac. Safari on my iPad and iPhone.
Used IE on a machine I installed W8 on hte other day and just couldn't get on with the navigation bar. It's too fiddly and takes a while to give me serch suggestions.