I'm using Firefox Beta 19 for Android on a MK808 mini PC (but this applies also to other devices when using any kind of external keyboard/mouse combo; I tested this also… (funda kabanzi)
I'm using Firefox Beta 19 for Android on a MK808 mini PC (but this applies also to other devices when using any kind of external keyboard/mouse combo; I tested this also with a Motorola XOOM 2 Media Edition tablet with similar results).
My keyboard is a Logitech K400 with a touchpad. It should scroll the page when swiped down/up with two fingers. The functionality does not work in Firefox; instead I have to hold the mouse button and swipe with one finger. The two-finger scroll gesture works with Chrome and the stock browser on this device, so this issue should be fixable. This is kind of annoying because Firefox acts differently from other apps.
Also, upon testing this with another wireless keyboard/mouse combo with an actual mouse I found out that the scroll wheel of the mouse was not working. Again, it works in Chrome, so this is a Firefox only behaviour. (Actually this makes perfect sense, because the two finger scroll is the Logitech keyboard's way of emulating the scroll wheel.) This is actually good news, because now I am sure sufficiently many users will be annoyed with this bug and it should get fixed.
Note: in case this information is useful, the mouse scrolling works on the Firefox start page with the thumbnails for most used links, but not on any other pages.
Addition: Found the bug: https://bugzilla.mozilla.org/show_bug.cgi?id=686228
Apparently there is a fix, but when does it reach the beta channel?