diff --git a/scripts/prebuild.sh b/scripts/prebuild.sh
index 141789e..b159c76 100755
--- a/scripts/prebuild.sh
+++ b/scripts/prebuild.sh
@@ -229,6 +229,11 @@ mkdir -vp app/src/main/assets/wallpapers/dark-dune
 mkdir -vp app/src/main/assets/wallpapers/dune
 mkdir -vp app/src/main/assets/wallpapers/firey-red
 
+# Disable legacy packaging to improve performance
+## Mozilla only keeps this on for the Gecko Profiler; we disable the Gecko Profiler at build-time, so we don't need to worry about it
+## https://bugzilla.mozilla.org/show_bug.cgi?id=1865634
+sed -i -e 's|useLegacyPackaging = .*|useLegacyPackaging = false|g' app/build.gradle
+
 # Set up target parameters
 case "$1" in
 arm)