[plug] Firefox and mouse button 2

[Jim Householder]

Jim Householder wrote:
> Hi
> 
> If I am not careful when using the mouse wheel to scroll through a web 
> page I press too hard and get a mouse button 2 press which opens an 
> unexpected web page.
> 
> How do I disable button 2?  There seems to be nothing in preferences to 
> allow one to specify mouse actions.

I found it in user.js