Enlarging the Firefox Scrollbar

On Linux Mint, the scrollbar in Firefox is very narrow, and doesn’t appear unless you hover the mouse cursor over it. This is a problem for my mom, who refuses to use the scroll wheel on her mouse, and insists on scrolling the hard way. But the scrollbar is so small, she has to struggle slowly and tediously to use it. Here is a fix for the ridiculously hard-to-see scrollbar.

Open about:config and say yes to the warning that appears. Set the following values:

This will make the scrollbar wide enough to see clearly and hit easily with the mouse cursor.

Next, open Settings and check General / Browsing / Always show scrollbars. This will eliminate the need to hover over the scrollbar to make it appear.