How to open .pdf file in Mozilla Thunderbird?

[Gordon]

Larry Alkoff wrote:
> Using Kubuntu 8.04.
> 
> I sometimes have to open a .pdf attachment in a Thunderbird email.
> 
> It's cumbersome to save the file first.
> How can I directly open the .pdf attachment?
> 
> I suspect it's in about:config
> but didn't find anything that might do it.
> 
> larry
> 

Does it just not open in your pdf reader when you double-click it?