I can't actually tell if that's sarcasm anymore or not. Next slide is a new URL, new page. Based on initial testing, the behavior seems fine. Same behavior as one would have for something like http://example.com/my-presentation/1.htm, 2.htm, 3.htm, etc. and navigating them with hyperlinks on each slide that link to neighboring slides.

It's not like Back/Forward browser buttons are overrode to behave and previous/next for the slide presentation.

Remember those horrible embedded Flash presentations that you couldn't directly link to a particular slide within the blob? Yeah, that "breaks the Web". Back/Forward is supposed to go back to the previous page the user was on (which is a "slide" in this case).

Using Chrome 43.0.2357.81 (64-bit) / OS X.