Bug 1707590 - Part 2: Implement nsJXLDecoder r=tnikkel

Differential Revision: https://phabricator.services.mozilla.com/D113359

image/DecoderFactory.cpp

@@ -23,6 +23,9 @@
 #ifdef MOZ_AV1
 #  include "nsAVIFDecoder.h"
 #endif
+#ifdef MOZ_JXL
+#  include "nsJXLDecoder.h"
+#endif
 
 namespace mozilla {
 
@@ -88,6 +91,11 @@ DecoderType DecoderFactory::GetDecoderType(const char* aMimeType) {
     type = DecoderType::AVIF;
   }
 #endif
+#ifdef MOZ_JXL
+  else if (!strcmp(aMimeType, IMAGE_JXL) && StaticPrefs::image_jxl_enabled()) {
+    type = DecoderType::JXL;
+  }
+#endif
 
   return type;
 }
@@ -130,6 +138,11 @@ already_AddRefed<Decoder> DecoderFactory::GetDecoder(DecoderType aType,
     case DecoderType::AVIF:
       decoder = new nsAVIFDecoder(aImage);
       break;
+#endif
+#ifdef MOZ_JXL
+    case DecoderType::JXL:
+      decoder = new nsJXLDecoder(aImage);
+      break;
 #endif
     default:
       MOZ_ASSERT_UNREACHABLE("Unknown decoder type");

image/DecoderFactory.h

@@ -15,8 +15,7 @@
 #include "nsCOMPtr.h"
 #include "SurfaceFlags.h"
 
-namespace mozilla {
+namespace mozilla::image {
-namespace image {
 
 class Decoder;
 class IDecodingTask;
@@ -39,6 +38,7 @@ enum class DecoderType {
   ICON,
   WEBP,
   AVIF,
+  JXL,
   UNKNOWN
 };
 
@@ -201,7 +201,6 @@ class DecoderFactory {
                                               bool aIsRedecode);
 };
 
-}  // namespace image
+}  // namespace mozilla::image
-}  // namespace mozilla
 
 #endif  // mozilla_image_DecoderFactory_h

image/build/nsImageModule.cpp

@@ -58,10 +58,14 @@ nsresult mozilla::image::EnsureModuleInitialized() {
 
   static ImageEnablementCookie kAVIFCookie = {
       mozilla::StaticPrefs::image_avif_enabled, "image/avif"_ns};
+  static ImageEnablementCookie kJXLCookie = {
+      mozilla::StaticPrefs::image_jxl_enabled, "image/jxl"_ns};
   static ImageEnablementCookie kWebPCookie = {
       mozilla::StaticPrefs::image_webp_enabled, "image/webp"_ns};
   Preferences::RegisterCallbackAndCall(UpdateContentViewerRegistration,
                                        "image.avif.enabled", &kAVIFCookie);
+  Preferences::RegisterCallbackAndCall(UpdateContentViewerRegistration,
+                                       "image.jxl.enabled", &kJXLCookie);
   Preferences::RegisterCallbackAndCall(UpdateContentViewerRegistration,
                                        "image.webp.enabled", &kWebPCookie);
 

image/decoders/moz.build

@@ -36,6 +36,11 @@ if CONFIG["MOZ_AV1"]:
         "nsAVIFDecoder.cpp",
     ]
 
+if CONFIG["MOZ_JXL"]:
+    UNIFIED_SOURCES += [
+        "nsJXLDecoder.cpp",
+    ]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += [

image/decoders/nsJXLDecoder.cpp

@@ -0,0 +1,163 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ImageLogging.h"  // Must appear first
+#include "gfxPlatform.h"
+#include "jxl/codestream_header.h"
+#include "jxl/decode_cxx.h"
+#include "jxl/types.h"
+#include "mozilla/TelemetryHistogramEnums.h"
+#include "mozilla/gfx/Point.h"
+#include "nsJXLDecoder.h"
+
+#include "RasterImage.h"
+#include "SurfacePipeFactory.h"
+
+using namespace mozilla::gfx;
+
+namespace mozilla::image {
+
+#define JXL_TRY(expr)                        \
+  do {                                       \
+    JxlDecoderStatus status = (expr);        \
+    if (status != JXL_DEC_SUCCESS) {         \
+      return Transition::TerminateFailure(); \
+    }                                        \
+  } while (0);
+
+#define JXL_TRY_BOOL(expr)                   \
+  do {                                       \
+    bool succeeded = (expr);                 \
+    if (!succeeded) {                        \
+      return Transition::TerminateFailure(); \
+    }                                        \
+  } while (0);
+
+static LazyLogModule sJXLLog("JXLDecoder");
+
+nsJXLDecoder::nsJXLDecoder(RasterImage* aImage)
+    : Decoder(aImage),
+      mLexer(Transition::ToUnbuffered(State::FINISHED_JXL_DATA, State::JXL_DATA,
+                                      SIZE_MAX),
+             Transition::TerminateSuccess()),
+      mDecoder(JxlDecoderMake(nullptr)),
+      mParallelRunner(
+          JxlThreadParallelRunnerMake(nullptr, PreferredThreadCount())) {
+  JxlDecoderSubscribeEvents(mDecoder.get(),
+                            JXL_DEC_BASIC_INFO | JXL_DEC_FULL_IMAGE);
+  JxlDecoderSetParallelRunner(mDecoder.get(), JxlThreadParallelRunner,
+                              mParallelRunner.get());
+
+  MOZ_LOG(sJXLLog, LogLevel::Debug,
+          ("[this=%p] nsJXLDecoder::nsJXLDecoder", this));
+}
+
+nsJXLDecoder::~nsJXLDecoder() {
+  MOZ_LOG(sJXLLog, LogLevel::Debug,
+          ("[this=%p] nsJXLDecoder::~nsJXLDecoder", this));
+}
+
+size_t nsJXLDecoder::PreferredThreadCount() {
+  if (IsMetadataDecode()) {
+    return 0;  // no additional worker thread
+  }
+  return JxlThreadParallelRunnerDefaultNumWorkerThreads();
+}
+
+LexerResult nsJXLDecoder::DoDecode(SourceBufferIterator& aIterator,
+                                   IResumable* aOnResume) {
+  // return LexerResult(TerminalState::FAILURE);
+  MOZ_ASSERT(!HasError(), "Shouldn't call DoDecode after error!");
+
+  return mLexer.Lex(aIterator, aOnResume,
+                    [=](State aState, const char* aData, size_t aLength) {
+                      switch (aState) {
+                        case State::JXL_DATA:
+                          return ReadJXLData(aData, aLength);
+                        case State::FINISHED_JXL_DATA:
+                          return FinishedJXLData();
+                      }
+                      MOZ_CRASH("Unknown State");
+                    });
+};
+
+LexerTransition<nsJXLDecoder::State> nsJXLDecoder::ReadJXLData(
+    const char* aData, size_t aLength) {
+  const uint8_t* input = (const uint8_t*)aData;
+  size_t length = aLength;
+  if (mBuffer.length() != 0) {
+    JXL_TRY_BOOL(mBuffer.append(aData, aLength));
+    input = mBuffer.begin();
+    length = mBuffer.length();
+  }
+  JXL_TRY(JxlDecoderSetInput(mDecoder.get(), input, length));
+
+  while (true) {
+    JxlDecoderStatus status = JxlDecoderProcessInput(mDecoder.get());
+    switch (status) {
+      case JXL_DEC_ERROR:
+      default:
+        return Transition::TerminateFailure();
+
+      case JXL_DEC_NEED_MORE_INPUT: {
+        size_t remaining = JxlDecoderReleaseInput(mDecoder.get());
+        mBuffer.clear();
+        JXL_TRY_BOOL(mBuffer.append(aData + aLength - remaining, remaining));
+        return Transition::ContinueUnbuffered(State::JXL_DATA);
+      }
+
+      case JXL_DEC_BASIC_INFO: {
+        JXL_TRY(JxlDecoderGetBasicInfo(mDecoder.get(), &mInfo));
+        PostSize(mInfo.xsize, mInfo.ysize);
+        if (mInfo.alpha_bits > 0) {
+          PostHasTransparency();
+        }
+        if (IsMetadataDecode()) {
+          return Transition::TerminateSuccess();
+        }
+        break;
+      }
+
+      case JXL_DEC_NEED_IMAGE_OUT_BUFFER: {
+        size_t size = 0;
+        JxlPixelFormat format{4, JXL_TYPE_UINT8, JXL_LITTLE_ENDIAN, 0};
+        JXL_TRY(JxlDecoderImageOutBufferSize(mDecoder.get(), &format, &size));
+
+        mOutBuffer.clear();
+        JXL_TRY_BOOL(mOutBuffer.growBy(size));
+        JXL_TRY(JxlDecoderSetImageOutBuffer(mDecoder.get(), &format,
+                                            mOutBuffer.begin(), size));
+        break;
+      }
+
+      case JXL_DEC_FULL_IMAGE: {
+        gfx::IntSize size(mInfo.xsize, mInfo.ysize);
+        Maybe<SurfacePipe> pipe = SurfacePipeFactory::CreateSurfacePipe(
+            this, size, OutputSize(), FullFrame(), SurfaceFormat::R8G8B8A8,
+            SurfaceFormat::OS_RGBA, Nothing(), nullptr, SurfacePipeFlags());
+        for (uint8_t* rowPtr = mOutBuffer.begin(); rowPtr < mOutBuffer.end();
+             rowPtr += mInfo.xsize * 4) {
+          pipe->WriteBuffer(reinterpret_cast<uint32_t*>(rowPtr));
+        }
+
+        if (Maybe<SurfaceInvalidRect> invalidRect = pipe->TakeInvalidRect()) {
+          PostInvalidation(invalidRect->mInputSpaceRect,
+                           Some(invalidRect->mOutputSpaceRect));
+        }
+        PostFrameStop();
+        PostDecodeDone();
+        return Transition::TerminateSuccess();
+      }
+    }
+  }
+}
+
+LexerTransition<nsJXLDecoder::State> nsJXLDecoder::FinishedJXLData() {
+  MOZ_ASSERT_UNREACHABLE("Read the entire address space?");
+  return Transition::TerminateFailure();
+}
+
+}  // namespace mozilla::image

image/decoders/nsJXLDecoder.h

@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_image_decoders_nsJXLDecoder_h
+#define mozilla_image_decoders_nsJXLDecoder_h
+
+#include "Decoder.h"
+#include "mp4parse.h"
+#include "SurfacePipe.h"
+
+#include "jxl/decode_cxx.h"
+#include "jxl/thread_parallel_runner_cxx.h"
+
+#include "mozilla/Telemetry.h"
+
+namespace mozilla::image {
+class RasterImage;
+
+class nsJXLDecoder final : public Decoder {
+ public:
+  virtual ~nsJXLDecoder();
+
+  DecoderType GetType() const override { return DecoderType::JXL; }
+
+ protected:
+  LexerResult DoDecode(SourceBufferIterator& aIterator,
+                       IResumable* aOnResume) override;
+
+ private:
+  friend class DecoderFactory;
+
+  // Decoders should only be instantiated via DecoderFactory.
+  explicit nsJXLDecoder(RasterImage* aImage);
+
+  size_t PreferredThreadCount();
+
+  enum class State { JXL_DATA, FINISHED_JXL_DATA };
+
+  LexerTransition<State> ReadJXLData(const char* aData, size_t aLength);
+  LexerTransition<State> FinishedJXLData();
+
+  StreamingLexer<State> mLexer;
+  JxlDecoderPtr mDecoder;
+  JxlThreadParallelRunnerPtr mParallelRunner;
+  Vector<uint8_t> mBuffer;
+  Vector<uint8_t> mOutBuffer;
+  JxlBasicInfo mInfo{};
+};
+
+}  // namespace mozilla::image
+
+#endif  // mozilla_image_decoders_nsJXLDecoder_h

image/imgLoader.cpp

@@ -2758,6 +2758,11 @@ nsresult imgLoader::GetMimeTypeFromContent(const char* aContents,
                         detected) &&
              detected.Equals(IMAGE_AVIF)) {
     aContentType.AssignLiteral(IMAGE_AVIF);
+  } else if ((aLength >= 2 && !memcmp(aContents, "\xFF\x0A", 2)) ||
+             (aLength >= 12 &&
+              !memcmp(aContents, "\x00\x00\x00\x0CJXL \x0D\x0A\x87\x0A", 12))) {
+    // Each version is for containerless and containerful files respectively.
+    aContentType.AssignLiteral(IMAGE_JXL);
   } else {
     /* none of the above?  I give up */
     return NS_ERROR_NOT_AVAILABLE;

image/test/fuzzing/TestDecoders.cpp

@@ -129,8 +129,13 @@ static int RunDecodeToSurfaceFuzzingAVIF(nsCOMPtr<nsIInputStream> inputStream) {
   return RunDecodeToSurfaceFuzzing(inputStream, "image/avif");
 }
 
+static int RunDecodeToSurfaceFuzzingJXL(nsCOMPtr<nsIInputStream> inputStream) {
+  return RunDecodeToSurfaceFuzzing(inputStream, "image/jxl");
+}
+
 int FuzzingInitImage(int* argc, char*** argv) {
   Preferences::SetBool("image.avif.enabled", true);
+  Preferences::SetBool("image.jxl.enabled", true);
 
   nsCOMPtr<imgITools> imgTools =
       do_CreateInstance("@mozilla.org/image/tools;1");
@@ -162,3 +167,6 @@ MOZ_FUZZING_INTERFACE_STREAM(FuzzingInitImage, RunDecodeToSurfaceFuzzingWebP,
 
 MOZ_FUZZING_INTERFACE_STREAM(FuzzingInitImage, RunDecodeToSurfaceFuzzingAVIF,
                              ImageAVIF);
+
+MOZ_FUZZING_INTERFACE_STREAM(FuzzingInitImage, RunDecodeToSurfaceFuzzingJXL,
+                             ImageJXL);

image/test/gtest/Common.cpp

@@ -47,6 +47,10 @@ AutoInitializeImageLib::AutoInitializeImageLib() {
   rv = Preferences::SetBool("image.avif.enabled", true);
   EXPECT_TRUE(rv == NS_OK);
 
+  // Ensure JXL is enabled to run decoder tests.
+  rv = Preferences::SetBool("image.jxl.enabled", true);
+  EXPECT_TRUE(rv == NS_OK);
+
   // Ensure that ImageLib services are initialized.
   nsCOMPtr<imgITools> imgTools =
       do_CreateInstance("@mozilla.org/image/tools;1");
@@ -438,6 +442,10 @@ ImageTestCase GreenAVIFTestCase() {
       .WithSurfaceFlags(SurfaceFlags::TO_SRGB_COLORSPACE);
 }
 
+ImageTestCase GreenJXLTestCase() {
+  return ImageTestCase("green.jxl", "image/jxl", IntSize(100, 100));
+}
+
 // Forcing sRGB is required until nsAVIFDecoder supports ICC profiles
 // See bug 1634741
 ImageTestCase Transparent10bit420AVIFTestCase() {
@@ -565,6 +573,11 @@ ImageTestCase LargeAVIFTestCase() {
                        TEST_CASE_IGNORE_OUTPUT);
 }
 
+ImageTestCase LargeJXLTestCase() {
+  return ImageTestCase("large.jxl", "image/jxl", IntSize(1200, 660),
+                       TEST_CASE_IGNORE_OUTPUT);
+}
+
 ImageTestCase GreenWebPIccSrgbTestCase() {
   return ImageTestCase("green.icc_srgb.webp", "image/webp", IntSize(100, 100));
 }
@@ -661,6 +674,11 @@ ImageTestCase TransparentWebPTestCase() {
   return test;
 }
 
+ImageTestCase TransparentJXLTestCase() {
+  return ImageTestCase("transparent.jxl", "image/jxl", IntSize(1200, 1200),
+                       TEST_CASE_IS_TRANSPARENT);
+}
+
 ImageTestCase TransparentNoAlphaHeaderWebPTestCase() {
   ImageTestCase test("transparent-no-alpha-header.webp", "image/webp",
                      IntSize(100, 100), TEST_CASE_IS_FUZZY);
@@ -750,6 +768,11 @@ ImageTestCase DownscaledAVIFTestCase() {
                        IntSize(20, 20));
 }
 
+ImageTestCase DownscaledJXLTestCase() {
+  return ImageTestCase("downscaled.jxl", "image/jxl", IntSize(100, 100),
+                       IntSize(20, 20));
+}
+
 ImageTestCase DownscaledTransparentICOWithANDMaskTestCase() {
   // This test case is an ICO with AND mask transparency. We want to ensure that
   // we can downscale it without crashing or triggering ASAN failures, but its

image/test/gtest/Common.h

@@ -476,6 +476,7 @@ ImageTestCase GreenICOTestCase();
 ImageTestCase GreenIconTestCase();
 ImageTestCase GreenWebPTestCase();
 ImageTestCase GreenAVIFTestCase();
+ImageTestCase GreenJXLTestCase();
 
 ImageTestCase Transparent10bit420AVIFTestCase();
 ImageTestCase Transparent10bit422AVIFTestCase();
@@ -490,6 +491,7 @@ ImageTestCase Transparent8bit444AVIFTestCase();
 ImageTestCase StackCheckAVIFTestCase();
 
 ImageTestCase LargeWebPTestCase();
+ImageTestCase LargeJXLTestCase();
 ImageTestCase GreenWebPIccSrgbTestCase();
 
 ImageTestCase GreenFirstFrameAnimatedGIFTestCase();
@@ -509,6 +511,7 @@ ImageTestCase CorruptICOWithBadBppTestCase();
 ImageTestCase TransparentPNGTestCase();
 ImageTestCase TransparentGIFTestCase();
 ImageTestCase TransparentWebPTestCase();
+ImageTestCase TransparentJXLTestCase();
 ImageTestCase TransparentNoAlphaHeaderWebPTestCase();
 ImageTestCase FirstFramePaddingGIFTestCase();
 ImageTestCase TransparentIfWithinICOBMPTestCase(TestCaseFlags aFlags);
@@ -526,6 +529,7 @@ ImageTestCase DownscaledBMPTestCase();
 ImageTestCase DownscaledICOTestCase();
 ImageTestCase DownscaledIconTestCase();
 ImageTestCase DownscaledWebPTestCase();
+ImageTestCase DownscaledJXLTestCase();
 ImageTestCase DownscaledTransparentICOWithANDMaskTestCase();
 
 ImageTestCase TruncatedSmallGIFTestCase();

image/test/gtest/TestDecoders.cpp

@@ -680,6 +680,7 @@ IMAGE_GTEST_DECODER_BASE_F(BMP)
 IMAGE_GTEST_DECODER_BASE_F(ICO)
 IMAGE_GTEST_DECODER_BASE_F(Icon)
 IMAGE_GTEST_DECODER_BASE_F(WebP)
+IMAGE_GTEST_DECODER_BASE_F(JXL)
 
 TEST_F(ImageDecoders, ICOWithANDMaskDownscaleDuringDecode) {
   CheckDownscaleDuringDecode(DownscaledTransparentICOWithANDMaskTestCase());
@@ -768,6 +769,10 @@ TEST_F(ImageDecoders, AVIFDownscaleDuringDecode) {
   CheckDownscaleDuringDecode(DownscaledAVIFTestCase());
 }
 
+TEST_F(ImageDecoders, JXLLargeMultiChunk) {
+  CheckDecoderMultiChunk(LargeJXLTestCase(), /* aChunkSize */ 64);
+}
+
 TEST_F(ImageDecoders, AnimatedGIFSingleChunk) {
   CheckDecoderSingleChunk(GreenFirstFrameAnimatedGIFTestCase());
 }

image/test/gtest/TestLoader.cpp

@@ -87,6 +87,19 @@ TEST_F(ImageLoader, DetectAVIFCompatibleBrand) {
   CheckMimeType(buffer, sizeof(buffer), IMAGE_AVIF);
 }
 
+TEST_F(ImageLoader, DetectJXLCodestream) {
+  const char buffer[] = "\xff\x0a";
+  CheckMimeType(buffer, sizeof(buffer), IMAGE_JXL);
+}
+
+TEST_F(ImageLoader, DetectJXLContainer) {
+  const char buffer[] =
+      "\x00\x00\x00\x0c"
+      "JXL "
+      "\x0d\x0a\x87\x0a";
+  CheckMimeType(buffer, sizeof(buffer), IMAGE_JXL);
+}
+
 TEST_F(ImageLoader, DetectNonImageMP4) {
   const char buffer[] =
       "\x00\x00\x00\x1c"  // box length

image/test/gtest/TestMetadata.cpp

@@ -153,6 +153,10 @@ TEST_F(ImageDecoderMetadata, BMP) { CheckMetadata(GreenBMPTestCase()); }
 TEST_F(ImageDecoderMetadata, ICO) { CheckMetadata(GreenICOTestCase()); }
 TEST_F(ImageDecoderMetadata, Icon) { CheckMetadata(GreenIconTestCase()); }
 TEST_F(ImageDecoderMetadata, WebP) { CheckMetadata(GreenWebPTestCase()); }
+TEST_F(ImageDecoderMetadata, JXL) { CheckMetadata(GreenJXLTestCase()); }
+TEST_F(ImageDecoderMetadata, TransparentJXL) {
+  CheckMetadata(TransparentJXLTestCase());
+}
 
 TEST_F(ImageDecoderMetadata, AnimatedGIF) {
   CheckMetadata(GreenFirstFrameAnimatedGIFTestCase());

image/test/gtest/moz.build

@@ -60,6 +60,7 @@ TEST_HARNESS_FILES.gtest += [
     "downscaled.ico",
     "downscaled.icon",
     "downscaled.jpg",
+    "downscaled.jxl",
     "downscaled.png",
     "downscaled.webp",
     "exif_resolution.jpg",
@@ -78,10 +79,12 @@ TEST_HARNESS_FILES.gtest += [
     "green.ico",
     "green.icon",
     "green.jpg",
+    "green.jxl",
     "green.png",
     "green.webp",
     "invalid-truncated-metadata.bmp",
     "large.avif",
+    "large.jxl",
     "large.webp",
     "multilayer.avif",
     "no-frame-delay.gif",
@@ -114,6 +117,7 @@ TEST_HARNESS_FILES.gtest += [
     "transparent-no-alpha-header.webp",
     "transparent.avif",
     "transparent.gif",
+    "transparent.jxl",
     "transparent.png",
     "transparent.webp",
 ]

image/test/reftest/jxl/reftest.list

@@ -0,0 +1,3 @@
+# JXL tests
+
+pref(image.jxl.enabled,true) == jxl-size-33x33.jxl jxl-size-33x33.png

image/test/reftest/reftest.list

@@ -28,6 +28,9 @@ skip-if(Android&&webrender) include ico/reftest.list
 # JPEG tests
 include jpeg/reftest.list
 
+# JXL tests
+skip-if(Android) include jxl/reftest.list
+
 # GIF tests
 include gif/reftest.list
 

modules/libpref/init/StaticPrefList.yaml

@@ -5488,6 +5488,12 @@
   value: true
   mirror: always
 
+# Whether we attempt to decode JXL images or not.
+- name: image.jxl.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
 #---------------------------------------------------------------------------
 # Prefs starting with "intl."
 #---------------------------------------------------------------------------

netwerk/mime/nsMimeTypes.h

@@ -159,6 +159,7 @@
 #define IMAGE_SVG_XML "image/svg+xml"
 #define IMAGE_WEBP "image/webp"
 #define IMAGE_AVIF "image/avif"
+#define IMAGE_JXL "image/jxl"
 
 #define MESSAGE_EXTERNAL_BODY "message/external-body"
 #define MESSAGE_NEWS "message/news"

toolkit/content/contentAreaUtils.js

@@ -1136,6 +1136,7 @@ const kImageExtensions = new Set([
   "svg",
   "webp",
   "avif",
+  "jxl",
 ]);
 
 function getNormalizedLeafName(aFile, aDefaultExtension) {

uriloader/exthandler/nsExternalHelperAppService.cpp

@@ -535,6 +535,7 @@ static const nsExtraMimeTypeEntry extraMimeEntries[] = {
     {IMAGE_SVG_XML, "svg", "Scalable Vector Graphics"},
     {IMAGE_WEBP, "webp", "WebP Image"},
     {IMAGE_AVIF, "avif", "AV1 Image File"},
+    {IMAGE_JXL, "jxl", "JPEG XL Image File"},
 
     {MESSAGE_RFC822, "eml", "RFC-822 data"},
     {TEXT_PLAIN, "txt,text", "Text File"},
@@ -605,7 +606,7 @@ static const char* forcedExtensionMimetypes[] = {
  * NOTE: These MUST be lower-case and ASCII.
  */
 static const char* descriptionOverwriteExtensions[] = {
-    "avif", "pdf", "svg", "webp", "xml",
+    "avif", "jxl", "pdf", "svg", "webp", "xml",
 };
 
 static StaticRefPtr<nsExternalHelperAppService> sExtHelperAppSvcSingleton;