configure: error: you do not have NSPR installed or your version is older than 4.12 ebuild calls only for >=nspr-4.11 Reproducible: Didn't try
commit 23a05cce7381683daae98316e3e9e7d2fdad5315 Author: Lars Wendler <polynomial-c@gentoo.org> Date: Thu Mar 10 07:39:13 2016 www-client/firefox: Fixed dependency on dev-libs/nspr (bug #576936). Package-Manager: portage-2.2.27 Signed-off-by: Lars Wendler <polynomial-c@gentoo.org> Thanks for the notification.
*** Bug 576938 has been marked as a duplicate of this bug. ***