--- a/Source/cmake/OptionsGTK.cmake	2021-05-10 10:02:55.000000000 +0200
+++ b/Source/cmake/OptionsGTK.cmake	2024-05-10 17:01:41.610031597 +0200
@@ -21,7 +21,6 @@
 find_package(Threads REQUIRED)
 find_package(ZLIB REQUIRED)
 find_package(ATK 2.16.0 REQUIRED)
-find_package(WebP REQUIRED COMPONENTS demux)
 find_package(ATSPI 2.5.3)
 find_package(EGL)
 find_package(OpenGL)
--- a/Source/WebCore/platform/ImageDecoders.cmake	2021-02-26 10:57:13.000000000 +0100
+++ b/Source/WebCore/platform/ImageDecoders.cmake	2024-05-10 17:27:37.870060143 +0200
@@ -6,7 +6,6 @@
     "${WEBCORE_DIR}/platform/image-decoders/jpeg"
     "${WEBCORE_DIR}/platform/image-decoders/jpeg2000"
     "${WEBCORE_DIR}/platform/image-decoders/png"
-    "${WEBCORE_DIR}/platform/image-decoders/webp"
 )
 
 list(APPEND WebCore_SOURCES
@@ -26,8 +25,6 @@
     platform/image-decoders/jpeg2000/JPEG2000ImageDecoder.cpp
 
     platform/image-decoders/png/PNGImageDecoder.cpp
-
-    platform/image-decoders/webp/WEBPImageDecoder.cpp
 )
 
 list(APPEND WebCore_LIBRARIES
@@ -39,13 +36,6 @@
     list(APPEND WebCore_LIBRARIES OpenJPEG::OpenJPEG)
 endif ()
 
-if (WebP_FOUND)
-    list(APPEND WebCore_LIBRARIES
-        WebP::demux
-        WebP::libwebp
-    )
-endif ()
-
 if (USE_CAIRO)
     list(APPEND WebCore_SOURCES
         platform/image-decoders/cairo/ImageBackingStoreCairo.cpp
--- a/Source/WebCore/platform/image-decoders/ScalableImageDecoder.cpp	2021-02-26 10:57:13.000000000 +0100
+++ b/Source/WebCore/platform/image-decoders/ScalableImageDecoder.cpp	2024-05-10 17:31:12.260064075 +0200
@@ -33,9 +33,6 @@
 #if USE(OPENJPEG)
 #include "JPEG2000ImageDecoder.h"
 #endif
-#if USE(WEBP)
-#include "WEBPImageDecoder.h"
-#endif
 
 #include <algorithm>
 #include <cmath>
@@ -90,13 +87,6 @@
 }
 #endif
 
-#if USE(WEBP)
-bool matchesWebPSignature(char* contents)
-{
-    return !memcmp(contents, "RIFF", 4) && !memcmp(contents + 8, "WEBPVP", 6);
-}
-#endif
-
 bool matchesBMPSignature(char* contents)
 {
     return !memcmp(contents, "BM", 2);
@@ -142,11 +132,6 @@
         return JPEG2000ImageDecoder::create(JPEG2000ImageDecoder::Format::J2K, alphaOption, gammaAndColorProfileOption);
 #endif
 
-#if USE(WEBP)
-    if (matchesWebPSignature(contents))
-        return WEBPImageDecoder::create(alphaOption, gammaAndColorProfileOption);
-#endif
-
     if (matchesBMPSignature(contents))
         return BMPImageDecoder::create(alphaOption, gammaAndColorProfileOption);