Debian Multimedia :: (xfce) Can't Copy Part Of A Webpage Using Chrome Or Firefox

I'm using:

Kernel 3.13.0-65-generic (i686)
Intel 945G video card
Xubuntu 14.04.3 with 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've 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
LibreOffice Writer
LibreOffice Calc
Mousepad

[URL]

Ex. Go to google.com and paste this in the search area:

can highlight by going upwards but not downwards xfce My mouse can highlight the first line starting with the word "ssh" and the last line ending with the word "everything ..."

My mouse cursor cannot go past the last line "expressions can match many items, but evidently not everything ..."

If I scroll upward, I can copy the entire webpage.

KDE 4.x I don't have this issue.

Using Win7 on a laptop with Firefox 41.0.2 and I'm able to scroll downwards without any issues using the same mouse that was connected to the machine with Xubuntu 14.04.

Sometimes I come across fixes for linux issues on websites. I copy the information and email it to myself for future reference in case I have to reinstall the OS again. I can do a ctrl A and ctrl c but then the entire website is copied. The ads on the side, etc.

If I put my left mouse cursor on the first word in a thread and drag/highlight downwards, my mouse cursor stops line 35 on the page. If I do the same thing but backwards, my mouse cursor goes all the way up the page. This only happens on Firefox and Google Chrome. This doesnt' happen with mousepad, Libre writer or Libre calc.