I don't make the code for the href, dadabik does it ! It's why I can't change it.
Of course, as you say, there is this solution : in fontawesome.css, I can replace "\f08b" by another code, "\f002" for the magnifier or "\f08c" for the "external link". For the moment it is this last one that I have put.
It remains that I find the icon to big, but I am not able tot change the size for the moment...
regards
Pascal.