search results links
I believe this is a bug, but you may believe it is a feature. Nevertheless...
When I have a list of tree search results, click name to get the popup window, and then (left) click either the name or the "tree" button at the bottom of the popup, the website opens the content BOTH in the current window, AND in a new tab. Both simultaneously, from one click. I tested this in both Firefox and Google Chrome and get the same results. I can't think of any legitimate use case where any link would open in two windows/tabs at the same time, as this is just a waste of bandwidth and browser memory.
Instead, if a user wants a link to open in a new window, they can right-click and choose to do so. Otherwise, any click from the search results should open only in the current window/tab. Or provide a setting where a user can choose the desired behavior. But I can't see how opening content in two windows/tabs simultaneously from one click would be anyone's desired behavior.