Can't scroll thumbnails on mobile chrome on android

[boxerab]

I have a new moto g phone with android kitkat. I can change w/l with single finger swipe,
change zoom with pinch, but I can't find a way of scrolling through the thumbnails: this is necessary because not all thumbnails can fit into the screen at one time.

[chafey]

Did you try clicking the scroll button (three horizontal lines)? It works for me on my iPad. I'll need help with debugging this on other devices as I don't have an android device