I have donated when the developer ask to help him to move to the new extension engine. Until today, I do not see any progress in the development and only complaints from the developer. Meanwhile I found some extensions that can partially replace the old and good TAB MIX PLUS: Focus On Left Tab After Closing Open Tabs Next to Current Manually change configuration to allow always open new tab from address bar: about:config -> browser.urlbar.openintab -> true
