I like the idea behind this - I was looking for a replacement for a now-defunct FF add-on that organized my history by day in my history menu. This is a pleasing UI, but two things I wish I could change:

1) I wish you could reverse the order in which the days are displayed, so that time goes left to right rather than right to left. I can't seem to get used to everything being backwards.

2) I wish you had the option to see more items at a time/have a more compressed layout (all the whitespace is nice aesthetically, but means I have to do a lot of scrolling).