Compare the behavior of the dropdown of the top search bar in Phabricator with e.g. the search box in the MediaWiki Vector skin. There, if you get several interesting search results in the dropdown, you can just middle-click them all to open them in new tabs (or right-click and select "Open in new window", or do any of the other things one can do with a link). Phabricator just navigates away in the current tab on any kind of click.
>>! In https://phabricator.wikimedia.org/T76812#821076 @Tgr wrote:
> For MediaWiki that was [[ https://phabricator.wikimedia.org/T19808 | T19808 ]] / https://gerrit.wikimedia.org/r/#/c/23674/ ; in general, you need to make sure, that the search dropdown items are wrapped in <a> tags pointing to the right location, and that the click handler does not catch non-left-clicks or left clicks with a modifier key. The code we used in MediaViewer for that is
>
> if ( e.altKey || e.shiftKey || e.ctrlKey || e.metaKey || e.button ) { /* let the browser handle the click * / }
>
> although it will be a bit more tricky if you want to be handle old IE versions correctly.
Original report: https://phabricator.wikimedia.org/T76812