In my experience, this is related to the amount of memory on your device, or maybe how your version of Android manages memory. Since I moved from an older (and admittedly a bit underpowered) Android 2.3.4 device to a new Android 4.4 device with more memory, I haven't had this problem.

I don't know whether there is a way to force Firefox to use more memory to avoid this problem on older devices. Maybe someone will have a suggestion.

I would have expected similar results to yours jscher2000, but my new device is running Android 4.3 and reports 2.5Gb of free spacce, 165 Mb free RAM.

often the redisplay of a page when returning to the app, or a tab if many tabs are open, takes longer than the initial display.??