Right now, if you open the "Friends & Members" sidebar and right click on someone's name, there is no option to "Open in new tab" or "Copy link" like with normal browser links. It looks like the entries aren't actual HTML links (despite having the appearance of links, with a hand cursor).

Since they're not links and I can't see what URL they lead to, I'm afraid to click on them because they might take me to a different page within the same tab, thus causing me to lose whatever I have open in my current tab (e.g. a list of ongoing jams that I've spent 5 minutes scrolling through).

Please use semantic HTML. It improves usability and it's literally less effort than restyling divs to behave like links.