yes, a little, but not as obvious as the metapdf viewer. I think the jerkiness tend to occur with one particular 2-column article (20 pages, 1.23 MB PDF) that I have. Most of the time, things are ok. Anyway, I tried out this article in the mozilla link and compare to metapdf. The metapdf experience is still more jerky - chunks of text appearing after a brief pause and in a left-column-then-right-column order. A transient “Loading” watermark often appeared during this 1-2 second period. Scrolling was also not as smooth or responsive as the mozilla link. Scrolling back to previous pages also trigger the “loading”. Not sure why, but fortunately, it’s only this PDF at the moment. My current Chrome is Version 55.0.2883.87 m (64-bit).