See some html's messages in external browser

[Arele]

Hi.
I would like to view some html's messages in external browser like 
iceweasel/firefox, opera,...
I have configured to see the html message with w3m or links2 but 
sometimes I would like to view all the message in graphical browser. 
Well, at this time urlview don't work like I want because sometimes I 
receive some messages who has not links to extract.
What hook or trick can I use?
Thanks