A lot of FUD, Fear, Uncertainty, and Doubt got passed around in this thread.
There's two points I wanted to address, but I don't intend to call the speaker out on it, so I'm not quoting them directly.
First, as we found out, this was *never* a Windows 8 problem. Firefox exhibited a behavior, not Windows. That happens sometimes, if a program hasn't been updated for the latest operating system. I'm not enough of a programmer to trace this out and determine what, exactly, caused the problem. But when it's just one application like this, I put the source of the issue as the application, not the operating system. I know why a non-technical user would think so. A technical one should have known better.
The second has to do with ownership. Part of the problem is language, but it's an important distinction. There's nothing *illegal* about changing the operating system on what I loosely call "Wintel" PC's (basically, any product defined as a computer and sold with Windows on it). Yes, you can void warranty and be unable to get support, but you *are* the owner of the PC and are still free to do it. Like dropping a Ford engine in a Chevy. If you want to go to the trouble, you have the right, but neither Ford nor Chevy are going to help you.
Part B of this is that it isn't Microsoft's doing. It's HP, Lenovo, Dell, whoever manufactured the PC, that's putting that restriction in place. They've opted to not build drivers outside of Windows 8/8.1 compatibility, have decided not to support anything else. Microsoft sells "OEM" copies (Original Equipment Manufacturer) of Windows at a drastically reduced price to manufacturers and then tells the manufacturer that they are solely responsible for included support (if any).
None of this should let Microsoft off the hook. I think the transition to a new interface was botched on many levels. I think I've become used to the new interface. I still prefer the old Start menu, despite the rather popular joke that to turn off your PC, you had to go to START. I believe that Microsoft had a plan that they never really told us about, and that, too, has been part of the problem.
But just because Microsoft has major flaws, it does not logically follow that they are the source of all of them.