A new icon is being tested by Bing in its search results interface, which will allow searchers to open the search result they are interested in directly or in a new window.
There are some searchers who have seen a rectangular box with an arrow when hovering over a search result. It can display on an ad or organic listing. The icon’s alternative text reads, “Click here to open in a new tab.” When clicking on it, that result opens up in a new tab while keeping the Bing search results as they were in the previous window.
The following screenshot is from The SEM Post blog:
I was unable to replicate this myself across different search queries.
Bing as a search setting that allows users to set this behavior by default. You can select “Open links from search results in a new tab or window” in the search settings as well.