First of all, thank you very much for the latest update, I was really excited to see the new updates including the new Customize Toolbar option in the settings. One button I was hoping to be able to add to the toolbar would be a "close current tab" button. Please let me know if this makes sense as a feature request.
User would click the button and the current tab would close. The previously active tab would show, if it exists, otherwise the home page would show. I have seen this feature on another browser, iCab.