Only in FF, Not Mac OS folder windows, when scrolling arrows are held at length scrollbar keeps scrolling to the top or bottom of long web pages with no way to stop this action.
When ever I single click the up or down ARROWS on my Firefox browser windows, they respond just as they are set to in my Mac OS 10.4.10/System Preferences/Appearance menu. They Jump to few lines up or down the Browser Page. Smooth Scrolling is not checked On. But, even when it was checked On, this same anomaly is Repeatable. - Holding either Arrow Button longer than a second or 2 will result in the page scrolling All The Way in the direction of the selected arrow. The Arrow button that was selected stays highlighted until the scroll bar reaches its end.
This anomaly does not happen in any other Mac App on my computer. Each time I select and Hold either scroll Arrow Button on any other app. or any folder on my desktop, as soon as I release the button the scrolling action stops immediately.
Opaite Mbohovái (1)
You need to reset your default settings. This just happened to me recently! Exit out of all fire fox programs the go to Start>Run> (firefox -safe-mode) a box will come up and press reset default settings exclude the parenthesis when entering