Would you like to have the middle mouse button, the scroll wheel, close your tabs in Konqueror the way it does in every other browser? Well want no more! Simply copy and paste the following into your terminal (Konsole) and press enter. Restart Konqueror if it is already opened, or close Konqueror before running this command.
kwriteconfig --file konquerorrc --group "FMSettings" --key MouseMiddleClickClosesTab --type bool true