Preference option for disabling HTML rendering in message body window.

[Julz]

Does anybody know if there is an option that can be specified in the 
prefs.js file that allows for the disabiling of the HTML rendering on 
mail messages?
I find that sometimes the rendering of mail messages crashes Mozilla and 
quite frankly I don't really want HTML pages sent to me as email.  So 
having them render as HTML code and/or a link at the top of the message 
allowing me to choose to show it as HTML would be really useful.
I know that you can disable the running of Javascript maybe the option 
could be above that.  Disable HTML also disables Javascript or you can 
just disable Javascript.

Cheers
Julz