Here's an interesting page I found on Wikipedia:
Usage share of web browsers (wikipedia.org)
Wow... just wow!
They seem to be updating this page often but here's how the image there looks now (at the time I'm writing this):
The reason, I think, that both Chrome and Safari are rising (and one reason why IE is decreasing) is because those browsers are available on mobile devices (tablets and smart phones).
Pretty simple, right?
Mobile use seems to clearly be taking over. If you haven't made the conversion yet to responsive website design, then you're already missing out on traffic. Like we've been saying, Google is going to favor websites that work well on mobile devices - especially when searches originate from those devices.
Here are some interesting stats with the Firefox web browser:
Here's an image showing all the versions of Firefox (click to open full version in a new window):
Here's a large image of all the different browsers that came to our website last month - it's a lot: