Mine

export MOZ_PHOENIX=1
ac_add_options --enable-application=browser
ac_add_options --disable-accessibility
ac_add_options --enable-crypto
ac_add_options --disable-tests
ac_add_options --disable-debug
ac_add_options --disable-logging
ac_add_options --disable-mailnews
ac_add_options --disable-installer
ac_add_options --disable-profilesharing
ac_add_options --enable-single-profile
ac_add_options --disable-mathml
ac_add_options --disable-activex
ac_add_options --disable-activex-scripting
ac_add_options --enable-strip
ac_add_options --disable-composer
ac_add_options --disable-jsd
ac_add_options --disable-ldap
ac_add_options --enable-strip
ac_add_options --enable-strip-libs
ac_add_options --disable-tests
ac_add_options --enable-extensions=default,-reporter,-venkman,-inspector,-irc
ac_add_options --enable-plaintext-editor-only
ac_add_options --disable-pedantic
ac_add_options --with-system-jpeg
ac_add_options --with-system-zlib
ac_add_options --with-system-png
ac_add_options --with-system-mng
ac_add_options --with-pthreads
ac_add_options --enable-xft
ac_add_options --enable-default-toolkit=gtk2
ac_add_options --disable-freetype2
ac_add_options --enable-system-cairo
ac_add_options --enable-official-branding
ac_add_options --enable-canvas
ac_add_options --enable-svg
ac_add_options --enable-optimize="-O2 -mtune=i386 -pipe"