diff --git a/mobile/android/config/mozconfigs/android-aarch64/nightly b/mobile/android/config/mozconfigs/android-aarch64/nightly
index 963ab380eaac..ad10f428b6ec 100644
--- a/mobile/android/config/mozconfigs/android-aarch64/nightly
+++ b/mobile/android/config/mozconfigs/android-aarch64/nightly
@@ -6,6 +6,12 @@ ac_add_options --target=aarch64-linux-android
 
 ac_add_options --with-branding=mobile/android/branding/nightly
 
+export AR="$topsrcdir/clang/bin/llvm-ar"
+export NM="$topsrcdir/clang/bin/llvm-nm"
+export RANLIB="$topsrcdir/clang/bin/llvm-ranlib"
+
+ac_add_options --enable-lto
+
 export MOZILLA_OFFICIAL=1
 export MOZ_TELEMETRY_REPORTING=1
 export MOZ_ANDROID_POCKET=1
diff --git a/mobile/android/config/mozconfigs/android-api-16/nightly b/mobile/android/config/mozconfigs/android-api-16/nightly
index ed0a3db43eef..6a1721ecde82 100644
--- a/mobile/android/config/mozconfigs/android-api-16/nightly
+++ b/mobile/android/config/mozconfigs/android-api-16/nightly
@@ -16,4 +16,10 @@ export MOZ_TELEMETRY_REPORTING=1
 export MOZ_ANDROID_MMA=1
 export MOZ_ANDROID_POCKET=1
 
+export AR="$topsrcdir/clang/bin/llvm-ar"
+export NM="$topsrcdir/clang/bin/llvm-nm"
+export RANLIB="$topsrcdir/clang/bin/llvm-ranlib"
+
+ac_add_options --enable-lto
+
 . "$topsrcdir/mobile/android/config/mozconfigs/common.override"
diff --git a/mobile/android/config/mozconfigs/android-x86/nightly b/mobile/android/config/mozconfigs/android-x86/nightly
index a5346d28ce15..f7776364dba7 100644
--- a/mobile/android/config/mozconfigs/android-x86/nightly
+++ b/mobile/android/config/mozconfigs/android-x86/nightly
@@ -14,4 +14,10 @@ export MOZILLA_OFFICIAL=1
 export MOZ_TELEMETRY_REPORTING=1
 export MOZ_ANDROID_POCKET=1
 
+export AR="$topsrcdir/clang/bin/llvm-ar"
+export NM="$topsrcdir/clang/bin/llvm-nm"
+export RANLIB="$topsrcdir/clang/bin/llvm-ranlib"
+
+ac_add_options --enable-lto
+
 . "$topsrcdir/mobile/android/config/mozconfigs/common.override"