use description from metadata.xml
<flag name="custom-optimization">Build with user-specified compiler optimizations
(-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)</flag>
<flag name="jemalloc3">Enable or disable jemalloc3 (forced-on when supported prior to 38.0)</flag>
- <flag name="gstreamer-0">Use gstreamer:0.10 instead of gstreamer:1 for media support</flag>
<flag name="system-cairo">Use the system-wide <pkg>x11-libs/cairo</pkg>
instead of bundled.</flag>
<flag name="system-harfbuzz">Use the system-wide <pkg>media-libs/harfbuzz</pkg>
<flag name="gtk2">Use the cairo-gtk2 rendering engine</flag>
<flag name="gmp-autoupdate">Allow Gecko Media Plugins (binary blobs) to be automatically
downloaded and kept up-to-date in user profiles</flag>
- <flag name="gstreamer-0">Use gstreamer:0.10 instead of gstreamer:1 for media support</flag>
<flag name="hwaccel">Force-enable hardware-accelerated rendering (Mozilla bug 594876)</flag>
<flag name="jemalloc">Enable or disable jemalloc</flag>
<flag name="jemalloc3">Enable or disable jemalloc3 (forced-on when supported prior to 38.0)</flag>