mozilla@gentoo.org Gentoo Mozilla Team Disable official Firefox/Thunderbird branding (icons, name) which are not binary-redistributable according to upstream. Use Clang compiler instead of GCC Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported) Disable EME (DRM plugin) cabability at build time Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles Enable app-global calendar support (note 38.0 and above bundles calendar support when this flag is off) Enable Link Time Optimization (LTO). Requires Gold linker when using GCC or LDD linker when using Clang Add support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time. Use the system-wide media-libs/dav1d and media-libs/libaom library instead of bundled. Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled. Use the system-wide dev-libs/icu instead of bundled. Use the system-wide media-libs/libjpeg-turbo instead of bundled. Use the system-wide dev-libs/libevent instead of bundled. Use the system-wide media-libs/libvpx instead of bundled. Use the system-wide dev-db/sqlite installation with secure-delete enabled Use the system-wide media-libs/libwebp instead of bundled.