Ah...yea, I should have turned off the cursor-hiding function that came with the controller I am using, because I am not using the features that require cursor hiding anyway. I hate the cursor hiding causing the browser to lose focus, too.
On my laptop, which is not a high-end at all, only chokes at scene loading for a second. But...weighing choking for a second in a browser vs. only a few people would play a downloadable, I choose the browser. :D