firefox-5.0,1 gives 488MB libxul.so

[Jan Henrik Sylvester]

A firefox-5.0,1 package build on my system is 207MB. I do not think that 
is expected, thus I examined the content:

33MB lib/firefox/libxul.so
488MB lib/firefox/sdk/lib/libxul.so

I am on 8.2-RELEASE/amd64, have nothing special in /etc/make.conf, and 
build firefox and all its dependencies with standard options.

Looking for old packages build on my system, I found firefox-3.6.13,1 
with 22MB and firefox-4.0.1,1 with 27MB. The problem seems to be new to 
firefox-5.0,1.

Cheers,
Jan Henrik