diff --git a/config/external/moz.build b/config/external/moz.build
index a24b470396cf..59ce39e6b29a 100644
--- a/config/external/moz.build
+++ b/config/external/moz.build
@@ -39,7 +39,7 @@ if CONFIG["MOZ_VORBIS"]:
 if not CONFIG["MOZ_SYSTEM_LIBVPX"]:
     external_dirs += ["media/libvpx"]
 
-if CONFIG["MOZ_AV1"]:
+if not CONFIG["MOZ_SYSTEM_AV1"]:
     external_dirs += ["media/libaom"]
     external_dirs += ["media/libdav1d"]
 
diff --git a/config/system-headers.mozbuild b/config/system-headers.mozbuild
index 9be9c05da18b..36552782ceec 100644
--- a/config/system-headers.mozbuild
+++ b/config/system-headers.mozbuild
@@ -1307,6 +1307,11 @@ if CONFIG["MOZ_ENABLE_LIBPROXY"]:
         "proxy.h",
     ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    system_headers += [
+        "dav1d/dav1d.h",
+    ]
+
 if CONFIG["MOZ_SYSTEM_ICU"]:
     system_headers += [
         "unicode/calendar.h",
diff --git a/dom/media/ipc/moz.build b/dom/media/ipc/moz.build
index a9440780ce6f..8b67baa43305 100644
--- a/dom/media/ipc/moz.build
+++ b/dom/media/ipc/moz.build
@@ -98,6 +98,9 @@ LOCAL_INCLUDES += [
     "/xpcom/base",
 ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 # Add libFuzzer configuration directives
diff --git a/dom/media/moz.build b/dom/media/moz.build
index 88d6a4a5040e..b6aace338bb2 100644
--- a/dom/media/moz.build
+++ b/dom/media/moz.build
@@ -402,6 +402,9 @@ if CONFIG["ENABLE_TESTS"]:
         "test/rdd_process_xpcom",
     ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += CONFIG["SKIA_INCLUDES"]
diff --git a/dom/media/mp4/moz.build b/dom/media/mp4/moz.build
index 48fce2a040cb..060a6f6b11d5 100644
--- a/dom/media/mp4/moz.build
+++ b/dom/media/mp4/moz.build
@@ -36,6 +36,9 @@ UNIFIED_SOURCES += [
 
 FINAL_LIBRARY = "xul"
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 # Suppress warnings for now.
 CXXFLAGS += [
     "-Wno-sign-compare",
diff --git a/dom/media/platforms/agnostic/eme/moz.build b/dom/media/platforms/agnostic/eme/moz.build
index 34f0007b3bcc..7e126e557ffc 100644
--- a/dom/media/platforms/agnostic/eme/moz.build
+++ b/dom/media/platforms/agnostic/eme/moz.build
@@ -17,6 +17,9 @@ UNIFIED_SOURCES += [
     "SamplesWaitingForKey.cpp",
 ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 FINAL_LIBRARY = "xul"
diff --git a/dom/media/platforms/agnostic/gmp/moz.build b/dom/media/platforms/agnostic/gmp/moz.build
index 362b6c765ff2..f597157d1cc4 100644
--- a/dom/media/platforms/agnostic/gmp/moz.build
+++ b/dom/media/platforms/agnostic/gmp/moz.build
@@ -22,6 +22,9 @@ UNIFIED_SOURCES += [
     "GMPVideoEncoder.cpp",
 ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 # GMPVideoEncodedFrameImpl.h needs IPC
 include("/ipc/chromium/chromium-config.mozbuild")
 
diff --git a/dom/media/platforms/ffmpeg/ffmpeg57/moz.build b/dom/media/platforms/ffmpeg/ffmpeg57/moz.build
index db48b36f6b72..16dabe325b94 100644
--- a/dom/media/platforms/ffmpeg/ffmpeg57/moz.build
+++ b/dom/media/platforms/ffmpeg/ffmpeg57/moz.build
@@ -30,6 +30,9 @@ if CONFIG['CC_TYPE'] == 'gcc':
     '-Wno-attributes',
   ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+  CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += [
diff --git a/dom/media/platforms/ffmpeg/ffmpeg58/moz.build b/dom/media/platforms/ffmpeg/ffmpeg58/moz.build
index 12e48c44f002..c95a71a2458a 100644
--- a/dom/media/platforms/ffmpeg/ffmpeg58/moz.build
+++ b/dom/media/platforms/ffmpeg/ffmpeg58/moz.build
@@ -38,6 +38,9 @@ if CONFIG['MOZ_ENABLE_VAAPI'] or CONFIG['MOZ_ENABLE_V4L2']:
   USE_LIBS += ['mozva']
   DEFINES['MOZ_USE_HWDECODE'] = 1
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+  CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += [
diff --git a/dom/media/platforms/ffmpeg/ffmpeg59/moz.build b/dom/media/platforms/ffmpeg/ffmpeg59/moz.build
index c4f7b899512e..b24e6d34032c 100644
--- a/dom/media/platforms/ffmpeg/ffmpeg59/moz.build
+++ b/dom/media/platforms/ffmpeg/ffmpeg59/moz.build
@@ -38,6 +38,9 @@ if CONFIG["MOZ_ENABLE_VAAPI"] or CONFIG["MOZ_ENABLE_V4L2"]:
     USE_LIBS += ["mozva"]
     DEFINES["MOZ_USE_HWDECODE"] = 1
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += [
diff --git a/dom/media/platforms/ffmpeg/ffmpeg60/moz.build b/dom/media/platforms/ffmpeg/ffmpeg60/moz.build
index c4f7b899512e..b24e6d34032c 100644
--- a/dom/media/platforms/ffmpeg/ffmpeg60/moz.build
+++ b/dom/media/platforms/ffmpeg/ffmpeg60/moz.build
@@ -38,6 +38,9 @@ if CONFIG["MOZ_ENABLE_VAAPI"] or CONFIG["MOZ_ENABLE_V4L2"]:
     USE_LIBS += ["mozva"]
     DEFINES["MOZ_USE_HWDECODE"] = 1
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += [
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/moz.build b/dom/media/platforms/ffmpeg/ffmpeg61/moz.build
index d598ae001720..fce65109e5dd 100644
--- a/dom/media/platforms/ffmpeg/ffmpeg61/moz.build
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/moz.build
@@ -38,6 +38,9 @@ if CONFIG["MOZ_ENABLE_VAAPI"] or CONFIG["MOZ_ENABLE_V4L2"]:
     USE_LIBS += ["mozva"]
     DEFINES["MOZ_USE_HWDECODE"] = 1
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += [
diff --git a/dom/media/platforms/ffmpeg/libav53/moz.build b/dom/media/platforms/ffmpeg/libav53/moz.build
index da79a95b4773..9099f592024c 100644
--- a/dom/media/platforms/ffmpeg/libav53/moz.build
+++ b/dom/media/platforms/ffmpeg/libav53/moz.build
@@ -26,6 +26,9 @@ if CONFIG['CC_TYPE'] == 'clang':
     '-Wno-unknown-attributes',
   ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+  CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += [
diff --git a/dom/media/platforms/ffmpeg/libav54/moz.build b/dom/media/platforms/ffmpeg/libav54/moz.build
index da79a95b4773..9099f592024c 100644
--- a/dom/media/platforms/ffmpeg/libav54/moz.build
+++ b/dom/media/platforms/ffmpeg/libav54/moz.build
@@ -26,6 +26,9 @@ if CONFIG['CC_TYPE'] == 'clang':
     '-Wno-unknown-attributes',
   ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+  CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += [
diff --git a/dom/media/platforms/ffmpeg/libav55/moz.build b/dom/media/platforms/ffmpeg/libav55/moz.build
index 7d813a4ac80a..3223b904d503 100644
--- a/dom/media/platforms/ffmpeg/libav55/moz.build
+++ b/dom/media/platforms/ffmpeg/libav55/moz.build
@@ -30,6 +30,9 @@ if CONFIG['CC_TYPE'] == 'gcc':
     '-Wno-attributes',
   ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+  CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 FINAL_LIBRARY = 'xul'
diff --git a/dom/media/platforms/ffmpeg/moz.build b/dom/media/platforms/ffmpeg/moz.build
index 3896da07d616..918142fab354 100644
--- a/dom/media/platforms/ffmpeg/moz.build
+++ b/dom/media/platforms/ffmpeg/moz.build
@@ -28,6 +28,9 @@ LOCAL_INCLUDES += [
     "/media/libyuv/libyuv/include",
 ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 if CONFIG["MOZ_WIDGET_TOOLKIT"] == "windows":
     LOCAL_INCLUDES += [
         "/gfx/thebes",
diff --git a/dom/media/platforms/moz.build b/dom/media/platforms/moz.build
index 61536cc6e225..b56379c06e92 100644
--- a/dom/media/platforms/moz.build
+++ b/dom/media/platforms/moz.build
@@ -71,6 +71,9 @@ if CONFIG["MOZ_AV1"]:
         "agnostic/AOMDecoder.cpp",
         "agnostic/DAV1DDecoder.cpp",
     ]
+    if CONFIG["MOZ_SYSTEM_AV1"]:
+        CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+        CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBDAV1D_CFLAGS"]
 
 if CONFIG["MOZ_OMX"]:
     EXPORTS += [
diff --git a/dom/media/systemservices/moz.build b/dom/media/systemservices/moz.build
index 59ad86a767a7..c4542f728b8e 100644
--- a/dom/media/systemservices/moz.build
+++ b/dom/media/systemservices/moz.build
@@ -107,6 +107,9 @@ IPDL_SOURCES += [
     "PMediaSystemResourceManager.ipdl",
 ]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 FINAL_LIBRARY = "xul"
diff --git a/dom/media/webaudio/moz.build b/dom/media/webaudio/moz.build
index 3ee8c0aa7633..5a053c61246d 100644
--- a/dom/media/webaudio/moz.build
+++ b/dom/media/webaudio/moz.build
@@ -145,6 +145,9 @@ if CONFIG["INTEL_ARCHITECTURE"]:
             CONFIG["SSE4_2_FLAGS"] + CONFIG["FMA_FLAGS"]
         )
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 FINAL_LIBRARY = "xul"
diff --git a/dom/media/webm/moz.build b/dom/media/webm/moz.build
index f65fe5bc6b35..26b4b95b5d33 100644
--- a/dom/media/webm/moz.build
+++ b/dom/media/webm/moz.build
@@ -22,6 +22,9 @@ UNIFIED_SOURCES += [
 
 CXXFLAGS += CONFIG["MOZ_LIBVPX_CFLAGS"]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 FINAL_LIBRARY = "xul"
 
 # Add libFuzzer configuration directives
diff --git a/image/decoders/moz.build b/image/decoders/moz.build
index d7e062f843ba..342496b36beb 100644
--- a/image/decoders/moz.build
+++ b/image/decoders/moz.build
@@ -36,6 +36,9 @@ if CONFIG["MOZ_AV1"]:
         "nsAVIFDecoder.cpp",
     ]
 
+    if CONFIG["MOZ_SYSTEM_AV1"]:
+        CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 if CONFIG["MOZ_JXL"]:
     UNIFIED_SOURCES += [
         "nsJXLDecoder.cpp",
diff --git a/image/moz.build b/image/moz.build
index b9a4dadee9a1..7fbd88d2840e 100644
--- a/image/moz.build
+++ b/image/moz.build
@@ -139,5 +139,8 @@ LOCAL_INCLUDES += [
 
 LOCAL_INCLUDES += CONFIG["SKIA_INCLUDES"]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    CXXFLAGS += CONFIG["MOZ_SYSTEM_LIBAOM_CFLAGS"]
+
 # Add libFuzzer configuration directives
 include("/tools/fuzzing/libfuzzer-config.mozbuild")
diff --git a/media/ffvpx/libavcodec/moz.build b/media/ffvpx/libavcodec/moz.build
index a15b6ab741f1..258224e6d22d 100644
--- a/media/ffvpx/libavcodec/moz.build
+++ b/media/ffvpx/libavcodec/moz.build
@@ -119,10 +119,16 @@ if not CONFIG['MOZ_FFVPX_AUDIOONLY']:
         'vp9recon.c',
         'vpx_rac.c',
     ]
-    USE_LIBS += [
-        'dav1d',
-        'media_libdav1d_asm',
-    ]
+
+    if CONFIG["MOZ_SYSTEM_AV1"]:
+        CFLAGS += CONFIG['MOZ_SYSTEM_LIBDAV1D_CFLAGS']
+        OS_LIBS += CONFIG['MOZ_SYSTEM_LIBDAV1D_LIBS']
+    else:
+        USE_LIBS += [
+            'dav1d',
+            'media_libdav1d_asm',
+        ]
+
     if CONFIG["MOZ_WIDGET_TOOLKIT"] == "gtk":
         LOCAL_INCLUDES += ['/media/mozva']
         SOURCES += [
diff --git a/toolkit/library/moz.build b/toolkit/library/moz.build
index fa7bcfcfc2f1..2f333484b13a 100644
--- a/toolkit/library/moz.build
+++ b/toolkit/library/moz.build
@@ -304,6 +304,10 @@ if CONFIG["MOZ_SYSTEM_LIBEVENT"]:
 if CONFIG["MOZ_SYSTEM_LIBVPX"]:
     OS_LIBS += CONFIG["MOZ_LIBVPX_LIBS"]
 
+if CONFIG["MOZ_SYSTEM_AV1"]:
+    OS_LIBS += CONFIG["MOZ_SYSTEM_LIBAOM_LIBS"]
+    OS_LIBS += CONFIG["MOZ_SYSTEM_LIBDAV1D_LIBS"]
+
 if not CONFIG["MOZ_TREE_PIXMAN"]:
     OS_LIBS += CONFIG["MOZ_PIXMAN_LIBS"]
 
diff --git a/toolkit/moz.configure b/toolkit/moz.configure
index bd6648a89e71..eb2a68715686 100644
--- a/toolkit/moz.configure
+++ b/toolkit/moz.configure
@@ -847,15 +847,21 @@ def av1(value):
         return True
 
 
-@depends(target, when=av1 & compile_environment)
-def dav1d_asm(target):
-    if target.cpu in ("arm", "aarch64", "x86", "x86_64"):
+option("--with-system-av1", help="Use system av1 (located with pkg-config)")
+
+pkg_check_modules("MOZ_SYSTEM_LIBAOM", "aom >= 3.0.0", when="--with-system-av1")
+pkg_check_modules("MOZ_SYSTEM_LIBDAV1D", "dav1d >= 1.2.1", when="--with-system-av1")
+
+
+@depends(target, "--with-system-av1", when=av1 & compile_environment)
+def dav1d_asm(target, system_av1):
+    if not system_av1 and target.cpu in ("arm", "aarch64", "x86", "x86_64"):
         return True
 
 
-@depends(target, when=av1 & compile_environment)
-def dav1d_nasm(target):
-    if target.cpu in ("x86", "x86_64"):
+@depends(target, "--with-system-av1", when=av1 & compile_environment)
+def dav1d_nasm(target, system_av1):
+    if not system_av1 and target.cpu in ("x86", "x86_64"):
         return namespace(version="2.14", what="AV1")
 
 
@@ -863,6 +869,7 @@ set_config("MOZ_DAV1D_ASM", dav1d_asm)
 set_define("MOZ_DAV1D_ASM", dav1d_asm)
 set_config("MOZ_AV1", av1)
 set_define("MOZ_AV1", av1)
+set_config("MOZ_SYSTEM_AV1", True, when="--with-system-av1")
 
 # JXL Image Codec Support
 # ==============================================================