diff --git a/srcpkgs/mozjs78/patches/build-non-jit-32bit.patch b/srcpkgs/mozjs78/patches/build-non-jit-32bit.patch
deleted file mode 100644
index f2cf04d79ac..00000000000
--- a/srcpkgs/mozjs78/patches/build-non-jit-32bit.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-On 32-bit systems without JIT, the GC doesn't like 4-byte alignment,
-so enforce a stricter one.
-
---- a/js/src/jit/none/MacroAssembler-none.h
-+++ b/js/src/jit/none/MacroAssembler-none.h
-@@ -100,7 +100,7 @@ static constexpr Register WasmTlsReg{Registers::invalid_reg};
- static constexpr Register WasmJitEntryReturnScratch{Registers::invalid_reg};
- 
- static constexpr uint32_t ABIStackAlignment = 4;
--static constexpr uint32_t CodeAlignment = sizeof(void*);
-+static constexpr uint32_t CodeAlignment = 8;
- static constexpr uint32_t JitStackAlignment = 8;
- static constexpr uint32_t JitStackValueAlignment =
-     JitStackAlignment / sizeof(Value);
diff --git a/srcpkgs/mozjs78/template b/srcpkgs/mozjs78/template
index ebfb5180191..7b437946b19 100644
--- a/srcpkgs/mozjs78/template
+++ b/srcpkgs/mozjs78/template
@@ -1,6 +1,6 @@
 # Template file for 'mozjs78'
 pkgname=mozjs78
-version=78.2.0
+version=78.9.0
 revision=1
 wrksrc="firefox-${version}"
 build_wrksrc=js/src
@@ -16,7 +16,7 @@ maintainer="q66 <daniel@octaforge.org>"
 license="MPL-2.0"
 homepage="https://www.mozilla.org/firefox/"
 distfiles="${MOZILLA_SITE}/firefox/releases/${version}esr/source/firefox-${version}esr.source.tar.xz"
-checksum=965ccfcbb8c0aa97639911997c54be0fcf896fd388b03138952089af675ea918
+checksum=8e03ac1dfc5ac804c8b13a529414a9387e0425e545bb2f4462d74c3175e64864
 patch_args="-Np1"
 
 CXXFLAGS="-Wno-class-memaccess"