When you type into the address bar of Firefox, it opens a pane containing suggestions:
Upon middle clicking on any of these suggestions, it opens the suggestion in a new tab, then switches to that tab, also removing what I’d typed into the address bar.
A GIF speaks louder than words here:
What I’d like to happen is the default for Google Chrome, which is where the suggestions pane doesn’t close upon middle-clicking a suggestion, meaning that I can middle-click to open many tabs from the pane:
How can I emulate Chrome’s pane middle-click behaviour in Firefox?