With Preview or with stable? Preview has a couple of minor bugs, like radio button popups that don't go away when I switch tabs, or the "undo close tab" toast n

With Preview or with stable? Preview has a couple of minor bugs, like radio button popups that don't go away when I switch tabs, or the "undo close tab" toast not disappearing, or downloads resulting in empty files sometimes. Annoying, but not dealbreakers and I'm confident they'll be fixed soon. My issue with stable is that it's slow. Everything about it is slow. Pages that load immediately in Chrome take double digit seconds in Firefox. When they do load, scrolling lags my finger and jerks around, and zooming is noticeable unresponsive. The acceleration curves feel off too. On my mid-range tablet performance is so bad it gives me a headache.