Full path to open Thunderbird?? tech help

I am still trying to get FF and thunderbird working together,
Trying to set the email client in FF,
see http://kb.mozillazine.org/Default_mail_client

I am having problems with working out the full path???
have tried /usr/share/applications/thunderbird but no luck, Any ideas anyone???

 

Idea (don't have T-bird loaded): /usr/bin/thunderbird

 

Thanks Rock Doctor,
Your reply prompted me to have another go. I wasn't expecting much success as i thought i used your suggestion on one of the early attempts.
Good news it works!!!!!!!!!
so the amendment is to /usr/bin/thunderbird.

For anyone else doing this i think i made the mistake of just amending the last word on the original line which is
/usr/acer/bin/onemail.
So with acer earlier on of course it wouldnt work.

Also if one reads the mozilla article under Linux-KDE there are instructions for finding out Full Paths. I have experimented and yes it does come up with the path above too.

So now i must still have another go at trying to get the TB icon on the desktop