Clicking on URN link in "all images" list causes page to scroll to the top
On this page in the Emulab portal: https://www.emulab.net/portal/images.php?all=1
When I scroll down a few screenfuls (say, to FBSD103-64-STD) and click on the URN anchor, the page content scrolls back to the top (or maybe the page reloads?). In any case, the thing I clicked on is no longer under my cursor, and indeed, it is no longer in the visible content. This is really confusing, since the user doesn't get to see the "pop up."
My browser: Firefox 53.0.2 on OS X 10.11.6 (El Capitan), with Adblock Plus and and Privacy Badger plugins.