Since we’ve introduced the “other tools” tab, we’ve added quick links to open the current page in your favorite tool.
The icons you saw were the favicons from these websites.
However, one of these websites, the Internet Archive, has been under a DDOS attack for a week; as a result, the pop-up takes forever to open.
Our apologies, we are planning a big new release, but that one isn’t ready yet. So in the meantime, a quick bugfix to help speed up the pop-up again.