As in turn it off or on, or change the curve itself? The option to turn it off or on is in the main Settings -> Mouse and Touchpad page with GNOME 44, labeled "Mouse Acceleration." Which is, in my opinion, easier than Windows' obscure Windows 95-style pop-up for "additional mouse settings" and then "enhance pointer precision."

Ah, you're on Android! In a few months, Firefox on Android will support all extensions. You should be able to use them then.