diff -rauN a/mozconfig b/mozconfig
--- a/mozconfig	2021-03-27 17:15:18.957711830 +0100
+++ b/mozconfig	2021-03-27 17:18:01.431035465 +0100
@@ -5,8 +5,9 @@
 ac_add_options --enable-release
 ac_add_options --enable-hardening
 ac_add_options --enable-optimize
-ac_add_options --enable-rust-simd
-ac_add_options --enable-linker=lld
+ac_add_options --disable-rust-simd
+ac_add_options --enable-linker=bfd
+ac_add_options --disable-webrtc
 ac_add_options --disable-elf-hack
 
 # Branding
@@ -35,3 +35,11 @@
 ac_add_options --enable-crashreporter
 ac_add_options --disable-updater
 ac_add_options --disable-tests
+
+# pentium4 specific options
+ac_add_options --disable-lto
+ac_add_options --disable-install-strip
+export CC=gcc
+export CXX=g++
+export AR=ar
+export NM=nm
+export RANLIB=ranlib
+export STRIP=strip