I cannot copy a portion of an entire webpage using Google Chrome or Firefox

[Epson]

I'm using:
Kernel 3.13.0-65-generic (i686)
Intel 945G video card
Xubuntu 14.04.3 with XFCE 4.10
xfce4-about 4.11.1 (Xfce 4.10)
Firefox 41.0.1
Google Chrome 45.0.2454.101
Dell generic usb mouse

I cannot copy a portion of an entire webpage using Google Chrome or Firefox when copying downwards.
Upwards works.

I have this issue on the same machine with the following systems:
Debian 8 Jessie XFCe with XFCE 4.10 using Firefox or Google Chrome
Xubuntu 14.04 with XFCE 4.10 and 4.12 using Firefox or Google Chrome
Xubuntu 12.04 live cd using Firefox

This doesn't happen on the same machine with the following systems:
Debian 8 Jessie KDE using Firefox or Google Chrome
Kubuntu 15.04 live DVD using Firefox
LMDE 2 Cinnamon live DVD 32 bit using Firefox 37.0
LibreOffice Writer
LibreOffice Calc
Mousepad

Has anyone else seen this?
Someone else reported this on the Ubuntu forums.
http://ubuntuforums.org/showthread.php?t=2283696

[Epson (epson-deactivatedaccount)]

Go go google.com
Put the words in quotes in the search area "can highlight by going upwards but not downwards xfce" and press enter.
Highlight the first weblink on the webpage after the section "About 4,710 results (0.52 seconds)" and press your left mouse button and highlight the words and scroll downwards.
How far do you get when scrolling?
Are you able to scroll all the way down by using your left mouse button and holding it?

[Epson (epson-deactivatedaccount)]

Go here:
https://www.google.com/search?q=can+highlight+by+going+upwards+but+not+downwards+xfce&ie=utf-8&oe=utf-8

Highlight the first weblink on the webpage after the section "About 4,710 results (0.52 seconds)", press your left mouse button and highlight the words and scroll downwards.
How far do you get when scrolling?
Are you able to scroll all the way down by using your left mouse button and holding it?

[Theo Linkspfeifer (lastonestanding)]

Works for me. Closing this report.