If you are playing something in a tab, then you hover over the tab icon, the audio icon appears directly above the tab icon. Although the hit box of the audio icon is smaller than the tab icon, the hit boxes are not exactly clear, and I think it is easy to misclick especially if you are not used to it. It would be more ideal and would look more nice if the two icons were separated somehow (I am thinking directly below).

System information:
Arch Linux, niri
Zen Browser Version 1.0.0-a.1 (64-bit)