Comment 2 for bug 1700004

I am also experiencing this issue. I'm using Calibre 3.2.1 and Chrome 58 on Windows 10. When clicking a footnote link, I see the URL in the address bar change to reflect the new position, but both the back button inside the content and the browser's back button take me back to the book details page, and the '<--' button at the left side of the page simply takes me to the previous footnote.

I speculate that the ebook viewer is doing history.replaceState rather than history.pushState.