I have had this problem on two separate midrange samsung phones now: after about an hour of browsing, firefox slows down considerably. Pages take a long time to load and tapping input registers erratically, sometimes i tap a link and after a few seconds a different link opens, as though the tap was registered from a different spot on the screen. This is happening even on a brand new phone, and after emptying the cache. I wish I could keep using this app because of privacy concerns but it is genuinely unusable for me now. This problem has cropped up in the past half a year