--- a/dom/canvas/WebGLTexture.cpp
+++ b/dom/canvas/WebGLTexture.cpp
@@ -807,20 +807,16 @@ WebGLTexture::GetTexParameter(TexTarget 
     case LOCAL_GL_TEXTURE_MAG_FILTER:
     case LOCAL_GL_TEXTURE_WRAP_S:
     case LOCAL_GL_TEXTURE_WRAP_T:
     case LOCAL_GL_TEXTURE_BASE_LEVEL:
     case LOCAL_GL_TEXTURE_COMPARE_FUNC:
     case LOCAL_GL_TEXTURE_COMPARE_MODE:
     case LOCAL_GL_TEXTURE_IMMUTABLE_LEVELS:
     case LOCAL_GL_TEXTURE_MAX_LEVEL:
-    case LOCAL_GL_TEXTURE_SWIZZLE_A:
-    case LOCAL_GL_TEXTURE_SWIZZLE_B:
-    case LOCAL_GL_TEXTURE_SWIZZLE_G:
-    case LOCAL_GL_TEXTURE_SWIZZLE_R:
     case LOCAL_GL_TEXTURE_WRAP_R:
         mContext->gl->fGetTexParameteriv(texTarget.get(), pname, &i);
         return JS::NumberValue(uint32_t(i));
 
     case LOCAL_GL_TEXTURE_IMMUTABLE_FORMAT:
         mContext->gl->fGetTexParameteriv(texTarget.get(), pname, &i);
         return JS::BooleanValue(bool(i));