2 row of tabs will be good, but it will be better, if you open many tabs, every tab should go smaller/thinner - like in firefox browser for example, it´s a good solution, IMHO
because now, if you have many tabs open than it is hard to switch smoothly between all opened tabs.
For example if you have 40 tabs open in Firefox than switching from tab40 to tab3 and than to tab29 and after to tab41 is very fast.
... and you can add an arrow on the left too.
Many thanks in advance if you can add this feature in the future, as standard or as option.