--- a/gfx/2d/ScaledFontMac.cpp
+++ b/gfx/2d/ScaledFontMac.cpp
@@ -376,16 +376,23 @@ ScaledFontMac::GetFontInstanceData(FontI
 
 bool
 ScaledFontMac::GetWRFontInstanceOptions(Maybe<wr::FontInstanceOptions>* aOutOptions,
                                         Maybe<wr::FontInstancePlatformOptions>* aOutPlatformOptions,
                                         std::vector<FontVariation>* aOutVariations)
 {
     GetVariationsForCTFont(mCTFont, aOutVariations);
 
+    wr::FontInstanceOptions options;
+    options.render_mode = wr::FontRenderMode::Subpixel;
+    options.subpx_dir = wr::SubpixelDirection::Horizontal;
+    options.synthetic_italics = false;
+    options.bg_color = wr::ToColorU(mFontSmoothingBackgroundColor);
+    *aOutOptions = Some(options);
+
     wr::FontInstancePlatformOptions platformOptions;
     platformOptions.font_smoothing = mUseFontSmoothing;
     *aOutPlatformOptions = Some(platformOptions);
     return true;
 }
 
 static CFDictionaryRef
 CreateVariationDictionaryOrNull(CGFontRef aCGFont, uint32_t aVariationCount,