Up until tonight's forced downgrade to version 29 form version 28, double clicking in the tab bar would open a new tab. I hate the 'new tab' button. It is a waste of space, easily accidentally clicked, and redundant since a simple double clicked open(ed) a new tab. I therefore use the remove new tab button add on to get rid of it and now need to know how to turn the double click back on in version 29?