That's almost certainly an internal engine feature, that means should work the same in FF and KM (in theory). Just different settings.
To some extent. Some apps don't have auto-scroll, NotePad is, erm, "noteable" for not having it
and nor does Ted Notepad. But also Lotus software generally. Autoscroll is built in to the OS, and programs need to enable it. To a large extent the HID drivers are where the main control happens, and very few of those show any way of adjusting it. Ah yes, H
It's also worth checking your monitor display settings. Tweaking those too far can take you away from the designed range of settings, which could look
good, but may not actually be
good. So you need to look at your monitor and
your graphics controller. Without further data, I'm leaning to the display settings as a good place to start.
But also consider the HID itself. How old is it? Is it a reputable brand, or some device specified down to a cost? Did the problems always happen, or start a bit later? And do these problems happen on other software?
FWIW, I'm running KM76RC1, which autoscrolls beautifully using a PS/2 optical mouse.
Gigabyte H61M-USB3-B3 r2.0, I5-2400 3.10GHz, 4GB RAM; W7HPx64 SP1, Lotus SmartSuite 9.8, K-Meleon 76RC, Pale Moon 26.4.1, IE11, Clyton email 17.0, Foxit Reader 126.96.36.1996, PaintShop Pro 6.02, SuRun 188.8.131.52, VoodooShield 14.8
Television is the first truly democratic culture -- the first culture available to everyone and entirely governed by what the people want. The most terrifying thing is what people do want. [Clive Barnes, 1969]