Mull is not smooth while scrolling. I used fennec and Iceraven. Both are smooth but mull is lacking. Please look into the matter.
Although agree to your point, however the right place to raise it is: DivestOS Mobile / Mull-Fenix · GitLab
Do you have a high refresh rate display?
https://divestos.org/index.php?page=broken#mull
Refresh rate is capped to 60hz due to resist fingerprinting. Please do not disable RFP.