Essentially two addons in one and HIGHLY customizable.
If you don't like the popup, you can just use it in the context menu. It also lets you define how new tabs are opened (load in current tab, open in new tab, open in tab next to this one, open in a new tab without switching to it...), and even define a middle-click setting as well.
Protip: To import your browser search engines, you can press Shift+F2 to bring up the GCLI, and use the command "folder openprofile", then get the file it mentions. No need to hunt, and if you have multiple profiles no need to try and figure out which one is your actual one.