====== Fix scroll in Ubuntu ======

Type 'about:config' in the address bar and search for the following settings and change their values as desired:
<code>
mousewheel.system_scroll_override_on_root_content.enabled
mousewheel.system_scroll_override_on_root_content.horizontal.factor
mousewheel.system_scroll_override_on_root_content.vertical.factor
</code>