Hi ForeverAl and ForeverAl, thank you for taking the time to report this issue!
I've worked on the alignment, it's been bugging me for a while too, thanks for raising this ticket.
However I've found that although it would be visually pleasing, aligning the bottom-most tab with the top of the address bar doesn't really make sense visually. In my opinion they are separate components, in separate contexts, they don't have to align.
Thank you for your help in making Orion a better browser!