Firefox 36beta7, 36beta8, 36beta9 comes with two copies gcc-4.7 in source tarball. In result size grow from ~170MB in beta6 to ~390MB in beta7,beta8,beta9 $ tar xjf /usr/portage/distfiles/firefox-36.0b9.source.tar.bz2 $ ls -l mozilla-beta/gcc.tar.xz -rw------- 1 root root 80458572 Feb 13 03:03 mozilla-beta/gcc.tar.xz $ du -hs mozilla-beta/gcc/ 433M mozilla-beta/gcc/ $ ./mozilla-beta/gcc/bin/gcc -v Using built-in specs. COLLECT_GCC=./mozilla-beta/gcc/bin/gcc COLLECT_LTO_WRAPPER=/root/111/mozilla-beta/gcc/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.7.3/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../gcc-4.7.3/configure --prefix=/tools/gcc --enable-languages=c,c++ --disable-nls --disable-gnu-unique-object --enable-__cxa_atexit --with-arch-32=pentiumpro Thread model: posix gcc version 4.7.3 (GCC)

+ thunderbird-36.0b1.source.tar.bz2 424045479 bytes also two copies of gcc-4.7.3

heh... + Firefox 31.5.0esr, Firefox 36.0, Firefox 37.0beta1, Thunderbird 31.5.0 Seems it nobody cares in mozilla