Add features from tab mix plus
In tab mix plus addon for firefox, many customizable features exist that would benefit vivaldi. The ability to remove the "X" close button that appears on each tab that you mouseover so you don't accidentally close the tab for those who use middle click to close tabs, and more. You can completely customize the tab bar to your own liking. The option of having unread tab's fonts appear in red/italic so you know which tab has been read/unread. The option of having the tab bar switch to two or more rows when it gets too crowded. TMP makes firefox super customizable and add many features that a browser for power users should have.
+1 Eventually I would like to see many TMP features built into V tabs. When the devs have time.