PA headers must be installed in order to compile firefox, this should be fixed at media-sound/pulseaudio first.
>=media-sound/apulse-0.1.9 is suitable for firefox
Limitations in package managers prevent a symbolic link from replacing a directory at merge time. This patch addresses that issue by removing the directory belonging to the currently installed thunderbird in pkg_preinst(). It's been tested against a direct upgrade form 45.7.0 as well as a reinstall, and seems to do the 'right thing' in all cases. Package-Manager: portage-2.3.3
This fixes bug 612252. Icu dependency is also updated.