diff --git a/gfx/thebes/gfxContext.cpp b/gfx/thebes/gfxContext.cpp
index 67517a698a28..96461358169f 100644
--- a/gfx/thebes/gfxContext.cpp
+++ b/gfx/thebes/gfxContext.cpp
@@ -751,19 +751,6 @@ gfxContext::GetPattern()
   return pat.forget();
 }
 
-void
-gfxContext::SetFontSmoothingBackgroundColor(const Color& aColor)
-{
-  CURRENTSTATE_CHANGED()
-  CurrentState().fontSmoothingBackgroundColor = aColor;
-}
-
-Color
-gfxContext::GetFontSmoothingBackgroundColor()
-{
-  return CurrentState().fontSmoothingBackgroundColor;
-}
-
 // masking
 void
 gfxContext::Mask(SourceSurface* aSurface, Float aAlpha, const Matrix& aTransform)
diff --git a/gfx/thebes/gfxContext.h b/gfx/thebes/gfxContext.h
index 2ac7ce87d676..f554a4e8ff83 100644
--- a/gfx/thebes/gfxContext.h
+++ b/gfx/thebes/gfxContext.h
@@ -281,13 +281,6 @@ public:
      */
     void SetPattern(gfxPattern *pattern);
 
-    /**
-     * Set the color that text drawn on top of transparent pixels should be
-     * anti-aliased into.
-     */
-    void SetFontSmoothingBackgroundColor(const mozilla::gfx::Color& aColor);
-    mozilla::gfx::Color GetFontSmoothingBackgroundColor();
-
     /**
      * Get the source pattern (solid color, normal pattern, surface, etc)
      */
diff --git a/gfx/thebes/gfxFont.h b/gfx/thebes/gfxFont.h
index b06ab56d0a5c..07d2c15fe17d 100644
--- a/gfx/thebes/gfxFont.h
+++ b/gfx/thebes/gfxFont.h
@@ -2298,7 +2298,6 @@ struct MOZ_STACK_CLASS TextRunDrawParams {
     gfxFont::Spacing        *spacing;
     gfxTextRunDrawCallbacks *callbacks;
     mozilla::SVGContextPaint *runContextPaint;
-    mozilla::gfx::Color      fontSmoothingBGColor;
     mozilla::gfx::Float      direction;
     double                   devPerApp;
     nscolor                  textStrokeColor;
diff --git a/gfx/thebes/gfxTextRun.cpp b/gfx/thebes/gfxTextRun.cpp
index 4a1d8ed0f0f3..d52f77017345 100644
--- a/gfx/thebes/gfxTextRun.cpp
+++ b/gfx/thebes/gfxTextRun.cpp
@@ -679,8 +679,6 @@ gfxTextRun::Draw(Range aRange, gfx::Point aPt, const DrawParams& aParams) const
     params.paintSVGGlyphs = !aParams.callbacks ||
         aParams.callbacks->mShouldPaintSVGGlyphs;
     params.dt = aParams.context->GetDrawTarget();
-    params.fontSmoothingBGColor =
-        aParams.context->GetFontSmoothingBackgroundColor();
 
     GlyphRunIterator iter(this, aRange);
     gfxFloat advance = 0.0;
diff --git a/layout/generic/nsTextFrame.cpp b/layout/generic/nsTextFrame.cpp
index 053ce3513f4e..b00c7ab45904 100644
--- a/layout/generic/nsTextFrame.cpp
+++ b/layout/generic/nsTextFrame.cpp
@@ -7092,10 +7092,7 @@ nsTextFrame::PaintText(const PaintTextParams& aParams,
   params.drawSoftHyphen = (GetStateBits() & TEXT_HYPHEN_BREAK) != 0;
   params.contextPaint = aParams.contextPaint;
   params.callbacks = aParams.callbacks;
-  aParams.context->SetFontSmoothingBackgroundColor(
-    Color::FromABGR(StyleFont()->mFont.fontSmoothingBackgroundColor));
   DrawText(range, textBaselinePt, params);
-  aParams.context->SetFontSmoothingBackgroundColor(Color());
 }
 
 static void
diff --git a/layout/xul/nsTextBoxFrame.cpp b/layout/xul/nsTextBoxFrame.cpp
index 93334540054d..bea04014d310 100644
--- a/layout/xul/nsTextBoxFrame.cpp
+++ b/layout/xul/nsTextBoxFrame.cpp
@@ -526,8 +526,6 @@ nsTextBoxFrame::DrawText(gfxContext&         aRenderingContext,
     nscolor c = aOverrideColor ? *aOverrideColor : StyleColor()->mColor;
     ColorPattern color(ToDeviceColor(c));
     aRenderingContext.SetColor(Color::FromABGR(c));
-    aRenderingContext.SetFontSmoothingBackgroundColor(
-        Color::FromABGR(StyleFont()->mFont.fontSmoothingBackgroundColor));
 
     nsresult rv = NS_ERROR_FAILURE;
 
@@ -599,8 +597,6 @@ nsTextBoxFrame::DrawText(gfxContext&         aRenderingContext,
       params.style = strikeStyle;
       nsCSSRendering::PaintDecorationLine(this, *drawTarget, params);
     }
-
-    aRenderingContext.SetFontSmoothingBackgroundColor(Color());
 }
 
 void
diff --git a/layout/xul/tree/nsTreeBodyFrame.cpp b/layout/xul/tree/nsTreeBodyFrame.cpp
index 51b2c8c874e9..096a5514f59a 100644
--- a/layout/xul/tree/nsTreeBodyFrame.cpp
+++ b/layout/xul/tree/nsTreeBodyFrame.cpp
@@ -3061,10 +3061,6 @@ nsTreeBodyFrame::PaintRow(int32_t               aRowIndex,
     theme = aPresContext->GetTheme();
   }
 
-  // Save the current font smoothing background color in case we change it.
-  Color originalColor(aRenderingContext.GetFontSmoothingBackgroundColor());
-  aRenderingContext.SetFontSmoothingBackgroundColor(
-    ToDeviceColor(rowContext->StyleFont()->mFont.fontSmoothingBackgroundColor));
   if (theme && theme->ThemeSupportsWidget(aPresContext, nullptr, appearance)) {
     nsRect dirty;
     dirty.IntersectRect(rowRect, aDirtyRect);
@@ -3174,11 +3170,6 @@ nsTreeBodyFrame::PaintRow(int32_t               aRowIndex,
       }
     }
   }
-  // If we've changed the font smoothing background color for this row, restore
-  // the color to the original one.
-  if (originalColor != aRenderingContext.GetFontSmoothingBackgroundColor()) {
-    aRenderingContext.SetFontSmoothingBackgroundColor(originalColor);
-  }
 
   return result;
 }