* Configuring search environment for revdep-rebuild
 * Temporary cache files are located in /var/cache/revdep-rebuild
 * Environment mismatch from previous run, deleting temporary files...

revdep-rebuild environment:
SEARCH_DIRS="/bin
/lib
/lib32
/lib64
/opt/bin
/opt/nvidia-cg-toolkit/bin
/opt/nvidia-cg-toolkit/lib32
/opt/nvidia-cg-toolkit/lib64
/opt/steam-runtime/lib32/
/opt/steam-runtime/lib32/i386-linux-gnu/
/opt/steam-runtime/usr/lib32/
/opt/steam-runtime/usr/lib32/i386-linux-gnu/
/sbin
/usr/bin
/usr/games/bin
/usr/games/lib
/usr/games/lib32
/usr/games/lib64
/usr/lib
/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2
/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2/32
/usr/lib/qt4
/usr/lib/sidplay/builders
/usr/lib32
/usr/lib32/OpenCL/vendors/mesa
/usr/lib32/emul-linux
/usr/lib32/opengl/xorg-x11/lib
/usr/lib32/qt4
/usr/lib64
/usr/lib64/OpenCL/vendors/mesa
/usr/lib64/R/lib
/usr/lib64/opengl/xorg-x11/lib
/usr/lib64/qca2
/usr/lib64/qt4
/usr/lib64/sidplay/builders
/usr/libexec
/usr/local/lib
/usr/local/lib32
/usr/local/lib64
/usr/sbin
/usr/x86_64-pc-linux-gnu/gcc-bin/4.8.2
/usr/x86_64-pc-linux-gnu/i686-pc-linux-gnu/gcc-bin/4.8.2
/usr/x86_64-pc-linux-gnu/lib"
SEARCH_DIRS_MASK="/lib/modules
/lib64/modules
/opt/android-sdk-update-manager
/opt/firefox
/opt/thunderbird
/usr/i686-pc-linux-gnu"
LD_LIBRARY_MASK="libjava.so
libjawt.so
libjvm.so
libodbc.so
libodbcinst.so"
PORTAGE_ROOT="/"
EMERGE_OPTIONS=""
ORDER_PKGS="1"
FULL_LD_PATH="1"

 * Checking reverse dependencies
 * Packages containing binaries and libraries broken by a package update
 * will be emerged.

 * Collecting system binaries and libraries
 * Generated new 1_files.rr
 * Collecting complete LD_LIBRARY_PATH
 * Generated new 2_ldpath.rr
 * Checking dynamic linking consistency
[ 43% ]  *   broken /usr/lib64/firefox/browser/components/libbrowsercomps.so (requires libmozalloc.so
libxul.so)
 *   broken /usr/lib64/firefox/components/libdbusservice.so (requires libmozalloc.so
libxul.so)
 *   broken /usr/lib64/firefox/components/libmozgnome.so (requires libmozalloc.so
libxul.so)
 *   broken /usr/lib64/firefox/plugin-container (requires libxul.so)
[ 100% ]                 
 * Generated new 3_broken.rr
 * Assigning files to packages
 *   /usr/lib64/firefox/browser/components/libbrowsercomps.so -> www-client/firefox
 *   /usr/lib64/firefox/components/libdbusservice.so -> www-client/firefox
 *   /usr/lib64/firefox/components/libmozgnome.so -> www-client/firefox
 *   /usr/lib64/firefox/plugin-container -> www-client/firefox
 * Generated new 4_raw.rr and 4_owners.rr
 * Cleaning list of packages to rebuild
 * Generated new 4_pkgs.rr
 * Assigning packages to ebuilds
 * Generated new 4_ebuilds.rr
 * Evaluating package order
 * Generated new 5_order.rr
 * All prepared. Starting rebuild
emerge --complete-graph=y --oneshot -v --keep-going=y --quiet-build=y --pretend --verbose www-client/firefox:0

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] www-client/firefox-27.0.1  USE="alsa dbus gstreamer jit libnotify minimal pulseaudio startup-notification system-icu system-jpeg system-sqlite wifi -bindist -custom-cflags -custom-optimization -debug -pgo 
(-selinux) -system-cairo" LINGUAS="ru -af -ar -as -ast -be -bg -bn_BD -bn_IN -br -bs -ca -cs -csb -cy -da -de -el -en_GB -en_ZA -eo -es_AR -es_CL -es_ES -es_MX -et -eu -fa -fi -fr -fy_NL -ga_IE -gd -gl -gu_IN -he -hi_IN -hr -hu 
-hy_AM -id -is -it -ja -kk -km -kn -ko -ku -lt -lv -mai -mk -ml -mr -nb_NO -nl -nn_NO -or -pa_IN -pl -pt_BR -pt_PT -rm -ro -si -sk -sl -son -sq -sr -sv_SE -ta -te -th -tr -uk -vi -xh -zh_CN -zh_TW -zu" 0 kB

Total: 1 package (1 reinstall), Size of downloads: 0 kB
 * Now you can remove -p (or --pretend) from arguments and re-run revdep-rebuild.