Firefox: Disable switching to new tab while opening bookmarks using middle mouse button.

[Guest]

When I click on a BOOKMARK from the bookmarks toolbar using the middle mouse button, the window automatically switches to the newly opened tab. How do I disable it?
I usually work with 10+ tabs.
So I want to switch to the new tab manually. (Only when I want to)

Thank you.

 

[Bejusek]

Tab mix plus settings again. This time Events -> Tab opening -> Focus/select tabs to open from and deselect bookmarks/history.