Tabs not aligned correctly

It seems that after an update in Firefox, the vertical alignment of the tabs is a little off.

<img width="1436" alt="Screenshot 2023-04-06 at 9 55 40 p m" src="https://user-images.githubusercontent.com/79347623/230537910-8867003c-2c5f-48e3-963e-280c94fdb9f7.png">

Is there a fix to this? I'm afraid I don't know any css...

Thanks anyway this nice theme :)