This pretty much sums up my opinions on the matter. I've used both, I just prefer using matte screens most of the time. I don't have to worry nearly as much about where I place my desk/monitor in relation to windows, etc. I still tend to place...
UPSes designed with SLA batteries in mind are constantly charging (float charging) the battery because that's how you keep SLA batteries healthy and ready to power the load for the longest period of time (talking lifespan of the battery here, not...
What if you take a full screen snapshot when FF is making the noise, then shutdown FF and just view the screenshot full screen. Do you still hear the noise?
If the answer is yes, then it's the pixel colors/dithering/patterns that FF displays...