With firefox5 and major, xulrunner is included in the same ebuild and as you say, is need at least of ~3GB[1] of diskspace. So, should be a good idea add a check to verify if there is the space that this ebuild requires. The sample code of this check, is available in libreoffice ebuild. [1] I'm not sure about exact space
Hi, I've tried with firefox7 and for me requires ~ 3.2 GB
This is avaliable in the overlay, will be moved to tree next bump.