diff --git a/extra/firefox/PKGBUILD b/extra/firefox/PKGBUILD
index d39771e8e..4e0f5228b 100644
--- a/extra/firefox/PKGBUILD
+++ b/extra/firefox/PKGBUILD
@@ -32,7 +32,7 @@ source=(https://archive.mozilla.org/pub/firefox/releases/$pkgver/source/firefox-
         $pkgname.desktop identity-icons-brand.svg)
 sha256sums=('fd0a4c11d007d9045706667eb0f99f9b7422945188424cb937bfef530cb6f4dd'
             'SKIP'
-            '5ead90994f91bed3231c2661977c69fc276cfbe278a1ab904daa544c9455ff42'
+            '2d4d91f7e35d0860225084e37ec320ca6cae669f6c9c8fe7735cdbd542e3a7c9'
             '298eae9de76ec53182f38d5c549d0379569916eebf62149f9d7f4a7edef36abf'
             'a9b8b4a0a1f4a7b4af77d5fc70c2686d624038909263c795ecc81e0aec7711e9')
 validpgpkeys=('14F26682D0916CDD81E37B6D61B7B526D98F0353') # Mozilla Software Releases <release@mozilla.com>
@@ -100,8 +100,15 @@ END
     echo "ac_add_options --disable-elf-hack" >> .mozconfig
     # https://bugzilla.redhat.com/show_bug.cgi?id=1641623
     echo "ac_add_options --disable-av1" >> .mozconfig
-    MAKEFLAGS="-j1"
+    # reduce jobs due to RAM constraints
+    MAKEFLAGS="-j4"
+    # disable hard-coded LTO
     sed -i '/cargo_rustc_flags += -Clto/d' config/makefiles/rust.mk
+    sed -i '/RUSTFLAGS += -Cembed-bitcode=yes/d' config/makefiles/rust.mk
+    # increase codegen-units due to RAM constraints
+    sed -i 's/codegen-units=1/codegen-units=16/' config/makefiles/rust.mk
+    # webrtc on ARMv7 implies android, so disable it
+    echo "ac_add_options --disable-webrtc" >> .mozconfig
   elif [[ $CARCH == "aarch64" ]]; then
     echo 'ac_add_options --enable-rust-simd' >> .mozconfig
   fi