Why does scroll bar for up and down scrolling disappear?
Can't control up and down scrolling on pages or open window because the scroll bar or bars (located at right side on prior computers) disappears in using my new iMac Yosemite OS X 10.10.5 computer.
Can't control up and down scrolling on pages or open window because the scroll bar or bars (located at right side on prior computers) disappears in using my new iMac Yosemite OS X 10.10.5 computer.
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Oops, your post duplicated. I replied here: https://support.mozilla.org/questions/1081306