diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-Cargo.toml-do-not-abort-on-panic.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-Cargo.toml-do-not-abort-on-panic.patch
new file mode 100644
index 0000000..e09848f
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-Cargo.toml-do-not-abort-on-panic.patch
@@ -0,0 +1,29 @@
+From 9e37248870b2b955293754933c789ca00bca06ef Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex@linutronix.de>
+Date: Fri, 1 Oct 2021 13:00:24 +0200
+Subject: [PATCH] Cargo.toml: do not abort on panic
+
+OE's rust is configured to unwind, and this setting clashes with it/
+
+Upstream-Status: Inappropriate [oe-core specific]
+Signed-off-by: Alexander Kanavin <alex@linutronix.de>
+---
+ Cargo.toml | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+--- a/Cargo.toml
++++ b/Cargo.toml
+@@ -51,13 +51,11 @@ opt-level = 1
+ rpath = false
+ lto = false
+ debug-assertions = true
+-panic = "abort"
+ 
+ [profile.release]
+ opt-level = 2
+ rpath = false
+ debug-assertions = false
+-panic = "abort"
+ 
+ # Optimize build dependencies, because bindgen and proc macros / style
+ # compilation take more to run than to build otherwise.
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-build-do-not-use-autoconf-s-config.sub-to-canonicali.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-build-do-not-use-autoconf-s-config.sub-to-canonicali.patch
new file mode 100644
index 0000000..a2ccf6b
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-build-do-not-use-autoconf-s-config.sub-to-canonicali.patch
@@ -0,0 +1,28 @@
+From e5b95b3918588e2930c9af7ba304c57e871b2d55 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex@linutronix.de>
+Date: Thu, 7 Oct 2021 12:44:18 +0200
+Subject: [PATCH] build: do not use autoconf's config.sub to 'canonicalize'
+ names
+
+The outcome is that processed names no longer match our custom rust
+target definitions, and the build fails.
+
+Upstream-Status: Inappropriate [oe-core specific]
+Signed-off-by: Alexander Kanavin <alex@linutronix.de>
+---
+ build/moz.configure/init.configure | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/build/moz.configure/init.configure b/build/moz.configure/init.configure
+index 3a164c6558..99dfc9054a 100644
+--- a/build/moz.configure/init.configure
++++ b/build/moz.configure/init.configure
+@@ -823,7 +823,7 @@ def help_host_target(help, host, target):
+ 
+ def config_sub(shell, triplet):
+     config_sub = os.path.join(os.path.dirname(__file__), "..", "autoconf", "config.sub")
+-    return check_cmd_output(shell, config_sub, triplet).strip()
++    return triplet
+ 
+ 
+ @depends("--host", shell)
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-rewrite-cargo-host-linker-in-python3.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-rewrite-cargo-host-linker-in-python3.patch
new file mode 100644
index 0000000..7b93817
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-rewrite-cargo-host-linker-in-python3.patch
@@ -0,0 +1,56 @@
+From 9eceb43dd676afe2f675bd65ab369ba4d14f6537 Mon Sep 17 00:00:00 2001
+From: Changqing Li <changqing.li@windriver.com>
+Date: Thu, 18 Nov 2021 07:16:39 +0000
+Subject: [PATCH] Rewrite cargo-host-linker in python3
+
+Mozjs compile failed with this failure:
+/bin/sh: /lib64/libc.so.6: version `GLIBC_2.33' not found (required by /build/tmp-glibc/work/corei7-64-wrs-linux/mozjs/91.1.0-r0/recipe-sysroot-native/usr/lib/libtinfo.so.5)
+
+Root Cause:
+cargo-host-linker has /bin/sh as it's interpreter, but cargo run the cmd
+with LD_LIBRARY_PATH set to recipe-sysroot-native. The host /bin/sh links
+libtinfo.so.5 under recipe-sysroot-native, which needs higher libc. But
+host libc is older libc. So the incompatible problem occurred.
+
+Solution:
+rewrite cargo-host-linker in python3
+
+Upstream-Status: Inappropriate [oe specific]
+
+Signed-off-by: Changqing Li <changqing.li@windriver.com>
+---
+ build/cargo-host-linker | 24 +++++++---
+ 1 file changed, 21 insertions(+), 3 deletions(-)
+
+diff --git a/build/cargo-host-linker b/build/cargo-host-linker
+index cbd0472bf7..ccd8bffec1 100755
+--- a/build/cargo-host-linker
++++ b/build/cargo-host-linker
+@@ -1,3 +1,21 @@
+-#!/bin/sh
+-# See comment in cargo-linker.
+-eval ${MOZ_CARGO_WRAP_HOST_LD} ${MOZ_CARGO_WRAP_HOST_LDFLAGS} '"$@"'
++#!/usr/bin/env python3
++
++import os,sys
++
++if os.environ['MOZ_CARGO_WRAP_HOST_LD'].strip():
++    binary=os.environ['MOZ_CARGO_WRAP_HOST_LD'].split()[0]
++else:
++    sys.exit(0)
++
++if os.environ['MOZ_CARGO_WRAP_HOST_LDFLAGS'].strip():
++    if os.environ['MOZ_CARGO_WRAP_HOST_LD'].split()[1:]:
++        args=[os.environ['MOZ_CARGO_WRAP_HOST_LD'].split()[0]] + os.environ['MOZ_CARGO_WRAP_HOST_LD'].split()[1:] + [os.environ['MOZ_CARGO_WRAP_HOST_LDFLAGS']] + sys.argv[1:]
++    else:
++        args=[os.environ['MOZ_CARGO_WRAP_HOST_LD'].split()[0]] + [os.environ['MOZ_CARGO_WRAP_HOST_LDFLAGS']] + sys.argv[1:]
++else:
++    if os.environ['MOZ_CARGO_WRAP_HOST_LD'].split()[1:]:
++        args=[os.environ['MOZ_CARGO_WRAP_HOST_LD'].split()[0]] + os.environ['MOZ_CARGO_WRAP_HOST_LD'].split()[1:] + sys.argv[1:]
++    else:
++        args=[os.environ['MOZ_CARGO_WRAP_HOST_LD'].split()[0]] + sys.argv[1:]
++
++os.execvp(binary, args)
+-- 
+2.33.1
+
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-util.configure-fix-one-occasionally-reproduced-confi.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-util.configure-fix-one-occasionally-reproduced-confi.patch
new file mode 100644
index 0000000..5472edd
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0001-util.configure-fix-one-occasionally-reproduced-confi.patch
@@ -0,0 +1,50 @@
+From b13cad4abc53f816f64c8b0af70cb46820746c72 Mon Sep 17 00:00:00 2001
+From: Changqing Li <changqing.li@windriver.com>
+Date: Thu, 11 Nov 2021 16:05:54 +0800
+Subject: [PATCH] util.configure: fix one occasionally reproduced configure
+ failure
+
+error:
+| checking whether the C++ compiler supports -Wno-range-loop-analysis...
+| DEBUG: Creating /tmp/conftest.jr1qrcw3.cpp with content:
+| DEBUG: | int
+| DEBUG: | main(void)
+| DEBUG: | {
+| DEBUG: |
+| DEBUG: | ;
+| DEBUG: | return 0;
+| DEBUG: | }
+| DEBUG: Executing: aarch64-wrs-linux-g++ -mcpu=cortex-a53 -march=armv8-a+crc -fstack-protector-strong -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/mozjs/91.1.0-r0/recipe-sysroot /tmp/conftest.jr1qrcw3.cpp -Werror -Wrange-loop-analysis -c
+| DEBUG: The command returned non-zero exit status 1.
+| DEBUG: Its error output was:
+...
+| File "/mozjs/91.1.0-r0/firefox-91.1.0/build/moz.configure/util.configure", line 239, in try_invoke_compiler
+| os.remove(path)
+| FileNotFoundError: [Errno 2] No such file or directory: '/tmp/conftest.jr1qrcw3.cpp'
+
+It should be another process that deleted this file by using
+"rm -rf conftest*" inappropriately
+
+Upstream-Status: Submitted [https://bugzilla.mozilla.org/show_bug.cgi?id=1740667]
+
+Signed-off-by: Changqing Li <changqing.li@windriver.com>
+---
+ build/moz.configure/util.configure | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/build/moz.configure/util.configure b/build/moz.configure/util.configure
+index 8f35e89c73..84e256647d 100644
+--- a/build/moz.configure/util.configure
++++ b/build/moz.configure/util.configure
+@@ -222,7 +222,7 @@ def try_invoke_compiler(compiler, language, source, flags=None, onerror=None):
+         "C++": ".cpp",
+     }[language]
+ 
+-    fd, path = mkstemp(prefix="conftest.", suffix=suffix, text=True)
++    fd, path = mkstemp(prefix="try_invoke_compiler_conftest.", suffix=suffix, text=True)
+     try:
+         source = source.encode("ascii", "replace")
+ 
+-- 
+2.17.1
+
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0002-moz.configure-do-not-look-for-llvm-objdump.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0002-moz.configure-do-not-look-for-llvm-objdump.patch
new file mode 100644
index 0000000..6ff83e3
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0002-moz.configure-do-not-look-for-llvm-objdump.patch
@@ -0,0 +1,43 @@
+From 0133ddb86eb6e0741e02b0032c41468db6438530 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex@linutronix.de>
+Date: Fri, 1 Oct 2021 13:01:10 +0200
+Subject: [PATCH] moz.configure: do not look for llvm-objdump
+
+This avoid dragging in a dependency that isn't even needed
+for js builds.
+
+Upstream-Status: Inappropriate [oe-core specific]
+Signed-off-by: Alexander Kanavin <alex@linutronix.de>
+---
+ moz.configure | 18 +++++++++---------
+ 1 file changed, 9 insertions(+), 9 deletions(-)
+
+diff --git a/moz.configure b/moz.configure
+index fc66b520d0..15de9a2ee0 100755
+--- a/moz.configure
++++ b/moz.configure
+@@ -994,15 +994,15 @@ def llvm_objdump(host_c_compiler, c_compiler, bindgen_config_paths):
+     return (llvm_objdump,)
+ 
+ 
+-llvm_objdump = check_prog(
+-    "LLVM_OBJDUMP",
+-    llvm_objdump,
+-    what="llvm-objdump",
+-    when="--enable-compile-environment",
+-    paths=clang_search_path,
+-)
+-
+-add_old_configure_assignment("LLVM_OBJDUMP", llvm_objdump)
++#llvm_objdump = check_prog(
++#    "LLVM_OBJDUMP",
++#    llvm_objdump,
++#    what="llvm-objdump",
++#    when="--enable-compile-environment",
++#    paths=clang_search_path,
++#)
++
++#add_old_configure_assignment("LLVM_OBJDUMP", llvm_objdump)
+ 
+ 
+ option("--enable-dtrace", help="Build with dtrace support")
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0003-rust.configure-do-not-try-to-find-a-suitable-upstrea.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0003-rust.configure-do-not-try-to-find-a-suitable-upstrea.patch
new file mode 100644
index 0000000..c440bf1
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0003-rust.configure-do-not-try-to-find-a-suitable-upstrea.patch
@@ -0,0 +1,65 @@
+From 749ba11fd6a69c8180945d4866415d16ae06a9c0 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex@linutronix.de>
+Date: Fri, 1 Oct 2021 13:02:17 +0200
+Subject: [PATCH] rust.configure: do not try to find a suitable upstream target
+
+OE is using custom targets and so this is bound to fail.
+
+Upstream-Status: Inapppropriate [oe-core specific]
+Signed-off-by: Alexander Kanavin <alex@linutronix.de>
+---
+ build/moz.configure/rust.configure | 34 ++----------------------------
+ 1 file changed, 2 insertions(+), 32 deletions(-)
+
+diff --git a/build/moz.configure/rust.configure b/build/moz.configure/rust.configure
+index cd77d72bb7..4b6481cbe3 100644
+--- a/build/moz.configure/rust.configure
++++ b/build/moz.configure/rust.configure
+@@ -459,33 +459,7 @@ def assert_rust_compile(host_or_target, rustc_target, rustc):
+ def rust_host_triple(
+     rustc, host, compiler_info, rustc_host, rust_supported_targets, arm_target
+ ):
+-    rustc_target = detect_rustc_target(
+-        host, compiler_info, arm_target, rust_supported_targets
+-    )
+-    if rustc_target != rustc_host:
+-        if host.alias == rustc_target:
+-            configure_host = host.alias
+-        else:
+-            configure_host = "{}/{}".format(host.alias, rustc_target)
+-        die(
+-            dedent(
+-                """\
+-        The rust compiler host ({rustc}) is not suitable for the configure host ({configure}).
+-
+-        You can solve this by:
+-        * Set your configure host to match the rust compiler host by editing your
+-        mozconfig and adding "ac_add_options --host={rustc}".
+-        * Or, install the rust toolchain for {configure}, if supported, by running
+-        "rustup default stable-{rustc_target}"
+-        """.format(
+-                    rustc=rustc_host,
+-                    configure=configure_host,
+-                    rustc_target=rustc_target,
+-                )
+-            )
+-        )
+-    assert_rust_compile(host, rustc_target, rustc)
+-    return rustc_target
++    return rustc_host
+ 
+ 
+ @depends(
+@@ -495,11 +469,7 @@ def rust_host_triple(
+ def rust_target_triple(
+     rustc, target, compiler_info, rust_supported_targets, arm_target
+ ):
+-    rustc_target = detect_rustc_target(
+-        target, compiler_info, arm_target, rust_supported_targets
+-    )
+-    assert_rust_compile(target, rustc_target, rustc)
+-    return rustc_target
++    return target.alias
+ 
+ 
+ set_config("RUST_TARGET", rust_target_triple)
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0004-use-asm-sgidefs.h.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0004-use-asm-sgidefs.h.patch
new file mode 100644
index 0000000..b56f0b9
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0004-use-asm-sgidefs.h.patch
@@ -0,0 +1,35 @@
+From 65acc8800dba7e10da882871d4648241805c47ce Mon Sep 17 00:00:00 2001
+From: Andre McCurdy <amccurdy@gmail.com>
+Date: Sat, 30 Apr 2016 15:29:06 -0700
+Subject: [PATCH] use <asm/sgidefs.h>
+
+Build fix for MIPS with musl libc
+
+The MIPS specific header <sgidefs.h> is provided by glibc and uclibc
+but not by musl. Regardless of the libc, the kernel headers provide
+<asm/sgidefs.h> which provides the same definitions, so use that
+instead.
+
+Upstream-Status: Pending
+
+[Vincent:
+Taken from: https://sourceware.org/bugzilla/show_bug.cgi?id=21070]
+
+Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
+---
+ gdb/mips-linux-nat.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/mfbt/RandomNum.cpp
++++ b/mfbt/RandomNum.cpp
+@@ -52,7 +52,7 @@ extern "C" BOOLEAN NTAPI RtlGenRandom(PV
+ #  elif defined(__s390__)
+ #    define GETRANDOM_NR 349
+ #  elif defined(__mips__)
+-#    include <sgidefs.h>
++#    include <asm/sgidefs.h>
+ #    if _MIPS_SIM == _MIPS_SIM_ABI32
+ #      define GETRANDOM_NR 4353
+ #    elif _MIPS_SIM == _MIPS_SIM_ABI64
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0005-nojit-32bit-arch-fix.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0005-nojit-32bit-arch-fix.patch
new file mode 100644
index 0000000..f308b48
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0005-nojit-32bit-arch-fix.patch
@@ -0,0 +1,21 @@
+Fix build when JIT is disabled on 32bit systems
+
+This fixes a compile time assert
+js/src/wasm/WasmFrame.cpp:57:3: error: static_assert failed due to requirement '(__builtin_offsetof(js::wasm::DebugFrame, frame_) + sizeof(js::wasm::Frame)) % Alignment == 0' "Aligned after pushing DebugFrame"
+  static_assert((offsetof(DebugFrame, frame_) + sizeof(Frame)) % Alignment == 0,
+  ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+--- a/js/src/wasm/WasmFrame.h
++++ b/js/src/wasm/WasmFrame.h
+@@ -230,6 +230,8 @@ class DebugFrame {
+   // Avoid -Wunused-private-field warnings.
+  protected:
+ #if defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_ARM) || \
++    (defined(JS_CODEGEN_NONE) && \
++     (defined(__riscv) && __riscv_xlen == 32) || defined(__mips__)) || \
+     defined(JS_CODEGEN_X86) || defined(__wasi__)
+   // See alignmentStaticAsserts().  For MIPS32, ARM32 and X86 DebugFrame is only
+   // 4-byte aligned, so we add another word to get up to 8-byte
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0006-Fix-build-on-powerpc.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0006-Fix-build-on-powerpc.patch
new file mode 100644
index 0000000..80bf746
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/0006-Fix-build-on-powerpc.patch
@@ -0,0 +1,36 @@
+From 0e0548e3f95e22a39db8d5b934afe0672a3f801b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@gmail.com>
+Date: Mon, 1 Nov 2021 08:13:29 +0100
+Subject: [PATCH] Fix build on powerpc
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Another fix for (this time JIT enabled)
+| <...>/irefox-91.2.0/js/src/wasm/WasmFrame.cpp:57:76: error: static assertion failed: Aligned after pushing DebugFrame
+|    57 |   static_assert((offsetof(DebugFrame, frame_) + sizeof(Frame)) % Alignment == 0,
+|       |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
+
+Upstream-Status: Pending
+
+Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
+---
+ js/src/wasm/WasmFrame.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/js/src/wasm/WasmFrame.h b/js/src/wasm/WasmFrame.h
+index 893762e..2d90656 100644
+--- a/js/src/wasm/WasmFrame.h
++++ b/js/src/wasm/WasmFrame.h
+@@ -232,7 +232,7 @@ class DebugFrame {
+ #if defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_ARM) || \
+     (defined(JS_CODEGEN_NONE) && \
+      (defined(__riscv) && __riscv_xlen == 32) || defined(__mips__)) || \
+-    defined(JS_CODEGEN_X86) || defined(__wasi__)
++    defined(JS_CODEGEN_X86) || defined(__wasi__) || defined(__powerpc__)
+   // See alignmentStaticAsserts().  For MIPS32, ARM32 and X86 DebugFrame is only
+   // 4-byte aligned, so we add another word to get up to 8-byte
+   // alignment.
+-- 
+2.31.1
+
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/fix-musl-build.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/fix-musl-build.patch
new file mode 100644
index 0000000..c0834af
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/fix-musl-build.patch
@@ -0,0 +1,15 @@
+Upstream: No
+Reason: mozjs60 miscompiles on musl if built with HAVE_THREAD_TLS_KEYWORD:
+https://github.com/void-linux/void-packages/issues/2598
+--- a/js/src/old-configure.in
++++ b/js/src/old-configure.in
+@@ -1072,6 +1072,9 @@ if test "$ac_cv_thread_keyword" = yes; t
+     *-android*|*-linuxandroid*)
+       :
+       ;;
++    *-musl*)
++      :
++      ;;
+     *)
+       AC_DEFINE(HAVE_THREAD_TLS_KEYWORD)
+       ;;
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/riscv32.patch b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/riscv32.patch
new file mode 100644
index 0000000..fe9c332
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91/riscv32.patch
@@ -0,0 +1,45 @@
+Add RISCV32 support
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+--- a/build/moz.configure/init.configure
++++ b/build/moz.configure/init.configure
+@@ -765,6 +765,9 @@ def split_triplet(triplet, allow_msvc=Fa
+     elif cpu.startswith("aarch64"):
+         canonical_cpu = "aarch64"
+         endianness = "little"
++    elif cpu in ("riscv32", "riscv32gc"):
++        canonical_cpu = "riscv32"
++        endianness = "little"
+     elif cpu in ("riscv64", "riscv64gc"):
+         canonical_cpu = "riscv64"
+         endianness = "little"
+--- a/python/mozbuild/mozbuild/configure/constants.py
++++ b/python/mozbuild/mozbuild/configure/constants.py
+@@ -52,6 +52,7 @@ CPU_bitness = {
+     "mips64": 64,
+     "ppc": 32,
+     "ppc64": 64,
++    'riscv32': 32,
+     "riscv64": 64,
+     "s390": 32,
+     "s390x": 64,
+@@ -94,6 +95,7 @@ CPU_preprocessor_checks = OrderedDict(
+         ("m68k", "__m68k__"),
+         ("mips64", "__mips64"),
+         ("mips32", "__mips__"),
++        ("riscv32", "__riscv && __riscv_xlen == 32"),
+         ("riscv64", "__riscv && __riscv_xlen == 64"),
+         ("sh4", "__sh__"),
+         ("wasm32", "__wasm32__"),
+--- a/python/mozbuild/mozbuild/test/configure/test_toolchain_configure.py
++++ b/python/mozbuild/mozbuild/test/configure/test_toolchain_configure.py
+@@ -1186,6 +1186,7 @@ class LinuxCrossCompileToolchainTest(Bas
+         "m68k-unknown-linux-gnu": big_endian + {"__m68k__": 1},
+         "mips64-unknown-linux-gnuabi64": big_endian + {"__mips64": 1, "__mips__": 1},
+         "mips-unknown-linux-gnu": big_endian + {"__mips__": 1},
++        "riscv32-unknown-linux-gnu": little_endian + {"__riscv": 1, "__riscv_xlen": 32},
+         "riscv64-unknown-linux-gnu": little_endian + {"__riscv": 1, "__riscv_xlen": 64},
+         "sh4-unknown-linux-gnu": little_endian + {"__sh__": 1},
+     }
diff --git a/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91_91.4.0.bb b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91_91.4.0.bb
new file mode 100644
index 0000000..dd02ed9
--- /dev/null
+++ b/meta-openembedded/meta-oe/recipes-extended/mozjs/mozjs-91_91.4.0.bb
@@ -0,0 +1,74 @@
+SUMMARY = "SpiderMonkey is Mozilla's JavaScript engine written in C/C++"
+HOMEPAGE = "https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey"
+LICENSE = "MPL-2.0"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=dc9b6ecd19a14a54a628edaaf23733bf"
+
+SRC_URI = "https://archive.mozilla.org/pub/firefox/releases/${PV}esr/source/firefox-${PV}esr.source.tar.xz \
+           file://0001-Cargo.toml-do-not-abort-on-panic.patch \
+           file://0002-moz.configure-do-not-look-for-llvm-objdump.patch \
+           file://0003-rust.configure-do-not-try-to-find-a-suitable-upstrea.patch \
+           file://0004-use-asm-sgidefs.h.patch \
+           file://fix-musl-build.patch \
+           file://0001-build-do-not-use-autoconf-s-config.sub-to-canonicali.patch \
+           file://riscv32.patch \
+           file://0005-nojit-32bit-arch-fix.patch \
+           file://0006-Fix-build-on-powerpc.patch \
+           file://0001-util.configure-fix-one-occasionally-reproduced-confi.patch \
+           file://0001-rewrite-cargo-host-linker-in-python3.patch  \
+           "
+SRC_URI[sha256sum] = "e722829db490f9332712a81c35996541737bbfb05232d47190fee779c4fcb327"
+
+S = "${WORKDIR}/firefox-${@d.getVar("PV").replace("esr", "")}"
+
+inherit pkgconfig perlnative python3native rust
+
+DEPENDS += "zlib cargo-native python3"
+
+B = "${WORKDIR}/build"
+
+export PYTHONPATH = "${S}/build:${S}/third_party/python/PyYAML/lib3:${S}/testing/mozbase/mozfile:${S}/python/mozboot:${S}/third_party/python/distro:${S}/testing/mozbase/mozinfo:${S}/config:${S}/testing/mozbase/manifestparser:${S}/third_party/python/pytoml:${S}/testing/mozbase/mozprocess:${S}/third_party/python/six:${S}/python/mozbuild:${S}/python/mozbuild/mozbuild:${S}/python/mach:${S}/third_party/python/jsmin:${S}/python/mozversioncontrol"
+
+export HOST_CC = "${BUILD_CC}"
+export HOST_CXX = "${BUILD_CXX}"
+export HOST_CFLAGS = "${BUILD_CFLAGS}"
+export HOST_CPPFLAGS = "${BUILD_CPPFLAGS}"
+export HOST_CXXFLAGS = "${BUILD_CXXFLAGS}"
+
+export AS = "${CC}"
+
+export RUSTFLAGS
+
+JIT ?= ""
+
+JIT:mipsarch = "--disable-jit"
+
+do_configure() {
+    cd ${B}
+    python3 ${S}/configure.py \
+        --enable-project=js \
+        --target=${HOST_SYS} \
+        --host=${BUILD_SYS} \
+        --prefix=${prefix} \
+        --libdir=${libdir} \
+        --disable-jemalloc \
+        ${JIT}
+
+}
+
+do_install() {
+    oe_runmake 'DESTDIR=${D}' install
+}
+
+inherit multilib_script multilib_header
+
+MULTILIB_SCRIPTS += " ${PN}-dev:${bindir}/js91-config"
+
+do_install:append() {
+    oe_multilib_header mozjs-91/js-config.h
+    sed -e 's@${STAGING_DIR_HOST}@@g' \
+        -i ${D}${bindir}/js91-config
+    rm -f ${D}${libdir}/libjs_static.ajs
+}
+
+PACKAGES =+ "lib${BPN}"
+FILES:lib${BPN} += "${libdir}/lib*"