Kudos on implementing one of the most requested feature.
However, I have certain issues with the present implementation like - current tab is repeated twice, not sharp visual distinction between all tabs, when only 1 tab it is shown on left, etc.
Moreover, I’ve used safari’s implementation for a considerable time and so I am more used to it. Also I find it more intuitive and easy to understand. Implementing it would also make transition from safari to Orion less cumbersome for others.
If Orion plans to keep both, it can done via flag in developer tools (like pdf.js).