Try it stock next.
I just went to a web site that I have been going to for years, and I was using the 'page down' key as I often do. I got to the end of the page, and I saw a "flash" - loading page, at the bottom of the screen, and the next page automatically loaded. I didn't have to click on "next". I just continued to "hit" the 'page down' key.
Is this the new normal, maybe coming, or just something unique to that web site. Because I like it. Using Firefox, windows 8.1
I have made a few changes to speed up Firefox that you see on Google in the "about:config" area. And I have added the "Fastest Fox" add-on.
If there is some setting I can do that would apply to "all" websites, I sure would like to do that.
Thanks in advance,
Eddie

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