diff --git a/filament/backend/src/opengl/OpenGLContext.cpp b/filament/backend/src/opengl/OpenGLContext.cpp
index 3741fffe82..ad92525ad3 100644
--- a/filament/backend/src/opengl/OpenGLContext.cpp
+++ b/filament/backend/src/opengl/OpenGLContext.cpp
@@ -262,8 +262,9 @@ void OpenGLContext::initExtensionsGLES(GLint major, GLint minor, ExtentionSet co
     ext.QCOM_tiled_rendering = hasExtension(exts, "GL_QCOM_tiled_rendering");
     ext.EXT_texture_compression_s3tc = hasExtension(exts, "GL_EXT_texture_compression_s3tc");
     ext.EXT_texture_compression_s3tc_srgb = hasExtension(exts, "GL_EXT_texture_compression_s3tc_srgb");
-    ext.WEBGL_texture_compression_s3tc = hasExtension(exts, "WEBGL_compressed_texture_s3tc");
-    ext.WEBGL_texture_compression_s3tc_srgb = hasExtension(exts, "WEBGL_compressed_texture_s3tc_srgb");
+    ext.WEBGL_compressed_texture_s3tc = hasExtension(exts, "WEBGL_compressed_texture_s3tc");
+    ext.WEBGL_compressed_texture_s3tc_srgb = hasExtension(exts, "WEBGL_compressed_texture_s3tc_srgb");
+    ext.WEBGL_compressed_texture_etc = hasExtension(exts, "WEBGL_compressed_texture_etc");
     // ES 3.2 implies EXT_color_buffer_float
     if (major >= 3 && minor >= 2) {
         ext.EXT_color_buffer_float = true;
diff --git a/filament/backend/src/opengl/OpenGLContext.h b/filament/backend/src/opengl/OpenGLContext.h
index 47a55cce97..48f801cbb0 100644
--- a/filament/backend/src/opengl/OpenGLContext.h
+++ b/filament/backend/src/opengl/OpenGLContext.h
@@ -147,8 +147,9 @@ public:
         bool GOOGLE_cpp_style_line_directive = false;
         bool EXT_texture_compression_s3tc = false;
         bool EXT_texture_compression_s3tc_srgb = false;
-        bool WEBGL_texture_compression_s3tc = false;
-        bool WEBGL_texture_compression_s3tc_srgb = false;
+        bool WEBGL_compressed_texture_s3tc = false;
+        bool WEBGL_compressed_texture_s3tc_srgb = false;
+        bool WEBGL_compressed_texture_etc = false;
     } ext;
 
     struct {
diff --git a/filament/backend/src/opengl/OpenGLDriver.cpp b/filament/backend/src/opengl/OpenGLDriver.cpp
index 5fc18caf90..fd6f396173 100644
--- a/filament/backend/src/opengl/OpenGLDriver.cpp
+++ b/filament/backend/src/opengl/OpenGLDriver.cpp
@@ -1440,13 +1440,18 @@ FenceStatus OpenGLDriver::wait(Handle<HwFence> fh, uint64_t timeout) {
 bool OpenGLDriver::isTextureFormatSupported(TextureFormat format) {
     const auto& ext = mContext.ext;
     if (isETC2Compression(format)) {
-        return ext.EXT_texture_compression_etc2;
+        return ext.EXT_texture_compression_etc2 ||
+               ext.WEBGL_compressed_texture_etc; // WEBGL specific, apparently contains ETC2
     }
     if (isS3TCSRGBCompression(format)) {
-        return ext.EXT_texture_compression_s3tc_srgb || ext.WEBGL_texture_compression_s3tc_srgb;
+        // see https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_texture_sRGB.txt
+        return  ext.WEBGL_compressed_texture_s3tc_srgb || // this is WEBGL specific
+                ext.EXT_texture_compression_s3tc_srgb || // this is ES specific
+               (ext.EXT_texture_compression_s3tc && ext.EXT_texture_sRGB);
     }
     if (isS3TCCompression(format)) {
-        return ext.EXT_texture_compression_s3tc || ext.WEBGL_texture_compression_s3tc;
+        return  ext.EXT_texture_compression_s3tc || // this is ES specific
+                ext.WEBGL_compressed_texture_s3tc; // this is WEBGL specific
     }
     return getInternalFormat(format) != 0;
 }