1: Download & install the Stylish Extension, it allows you to edit your UserChrome.CSS easily:
https://addons.mozilla.org/firefox/2108/
2: In FireFox, go to Tools > Extensions > Right-Click Stylish > Options > Click the "Add..." Button > Under the large box, copy and paste this text:
/* OSX-style scroll arrows */
scrollbarbutton[sbattr="scrollbar-up-top"]{
display: none !important;
}
scrollbarbutton[sbattr="scrollbar-up-bottom"]{
display: -moz-box !important;
}
3: In the smaller box, type in "OSX-Style Scrollbar Arrows" (Without quotes).
Click "Apply" then "Save".
Screenshot (to make sure you've got it correctly):
http://img65.imageshack.us/my.php?im...eenshot0rb.png
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