The latest ebuild for mozilla-firefox uses 'perl -pi -e' as a replacement for sed command, which should add a DEPEND on perl. As perl is not in the standard profile, I think it should be simpler to use sed instead of perl, as the difference between the performance is very small and four calls aren't too much. I'll be happy to submit a patch but I think this could be done by anyone, as 'perl -pi -e' is exactly the same of 'sed -i -e'. HTH, Diego
Fixed.