This weird scrolling problem has actually been occurring on my PC, which is an HP Pavilion p7-1155 that runs on Windows 7, for years, but lately it has often become so bad that I decided it's finally time to fix it for good. That is, some evenings when I'm using Mozilla Firefox (currently using version 50.1.0), to scroll down the pages of search results on eBay, esp. when I've had it set to list the maximum of 200 items per page, the scrolling is extremely difficult, troublesome, & slow - not at all smooth & fast. It's very stiff & herky-jerky. But if I change the setting to fewer items per page, such as 100 or 50, then there's some improvement - the fewer items per page the better. What could possibly cause this, and what can I do about it? Any attempt or effort to help in any way whatsoever will be greatly well-appreciated. Thanks.
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