B. A screenshot or recording of the issue (Licecap is totally free to use http://www.cockos.com/licecap/)
C. A listing of:
i. Your Operating System and version
OS X 10.11.6
ii. Your Brave Version. (Desktop users please copy info from about:brave using the clipboard if possible)
D. Detailed step-by-step instructions of how you came across the issue.
i. Hover over tab for preview
ii. View dims and shows tab preview
iii. ~0.5s view opacity increases, resulting in a dimming effect
It would make sense if its supposed to be one smooth transition. In that case a potential fix would be involve tweaking the transition curves / delays.
Alternatively, remove the second transition because its intuitive without it