--- a/layout/generic/nsTextFrame.cpp
+++ b/layout/generic/nsTextFrame.cpp
@@ -6103,48 +6103,56 @@ nsTextFrame::PaintDecorationLine(const P
 }
 
 /**
  * This, plus kSelectionTypesWithDecorations, encapsulates all knowledge
  * about drawing text decoration for selections.
  */
 void
 nsTextFrame::DrawSelectionDecorations(gfxContext* aContext,
+                                      TextDrawTarget* aTextDrawer,
                                       const LayoutDeviceRect& aDirtyRect,
                                       SelectionType aSelectionType,
                                       nsTextPaintStyle& aTextPaintStyle,
                                       const TextRangeStyle &aRangeStyle,
                                       const Point& aPt,
                                       gfxFloat aICoordInFrame,
                                       gfxFloat aWidth,
                                       gfxFloat aAscent,
                                       const gfxFont::Metrics& aFontMetrics,
                                       DrawPathCallbacks* aCallbacks,
                                       bool aVertical,
                                       gfxFloat aDecorationOffsetDir,
                                       uint8_t aDecoration)
 {
   PaintDecorationLineParams params;
   params.context = aContext;
+  params.textDrawer = aTextDrawer;
   params.dirtyRect = aDirtyRect;
   params.pt = aPt;
   params.lineSize.width = aWidth;
   params.ascent = aAscent;
   params.offset = aDecoration == NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE ?
                   aFontMetrics.underlineOffset : aFontMetrics.maxAscent;
   params.decoration = aDecoration;
   params.decorationType = DecorationType::Selection;
   params.callbacks = aCallbacks;
   params.vertical = aVertical;
   params.descentLimit =
     ComputeDescentLimitForSelectionUnderline(aTextPaintStyle.PresContext(),
                                              aFontMetrics);
 
   float relativeSize;
 
+  // Since this happens after text, all we *should* be allowed to do is strikeThrough.
+  // If this isn't true, we're at least bug-compatible with gecko!
+  if (aTextDrawer) {
+    aTextDrawer->StartDrawing(TextDrawTarget::Phase::eLineThrough);
+  }
+
   switch (aSelectionType) {
     case SelectionType::eIMERawClause:
     case SelectionType::eIMESelectedRawClause:
     case SelectionType::eIMEConvertedClause:
     case SelectionType::eIMESelectedClause:
     case SelectionType::eSpellCheck: {
       int32_t index = nsTextPaintStyle::
         GetUnderlineStyleIndexForSelectionType(aSelectionType);
@@ -6803,17 +6811,17 @@ nsTextFrame::PaintTextSelectionDecoratio
                (mTextRun->IsInlineReversed() ? advance : 0)) / app;
       } else {
         pt.x = (aParams.framePt.x + iOffset -
                (mTextRun->IsInlineReversed() ? advance : 0)) / app;
       }
       gfxFloat width = Abs(advance) / app;
       gfxFloat xInFrame = pt.x - (aParams.framePt.x / app);
       DrawSelectionDecorations(
-        aParams.context, aParams.dirtyRect, aSelectionType,
+        aParams.context, aParams.textDrawer, aParams.dirtyRect, aSelectionType,
         *aParams.textPaintStyle, selectedStyle, pt, xInFrame,
         width, mAscent / app, decorationMetrics, aParams.callbacks,
         verticalRun, decorationOffsetDir, kDecoration);
     }
     iterator.UpdateWithAdvance(advance);
   }
 }
 

--- a/layout/generic/nsTextFrame.h
+++ b/layout/generic/nsTextFrame.h
@@ -823,16 +823,17 @@ protected:
   // If the result rect is larger than the given rect, this returns true.
   bool CombineSelectionUnderlineRect(nsPresContext* aPresContext,
                                      nsRect& aRect);
 
   /**
    * Utility methods to paint selection.
    */
   void DrawSelectionDecorations(gfxContext* aContext,
+                                TextDrawTarget* aTextDrawer,
                                 const LayoutDeviceRect& aDirtyRect,
                                 mozilla::SelectionType aSelectionType,
                                 nsTextPaintStyle& aTextPaintStyle,
                                 const TextRangeStyle& aRangeStyle,
                                 const Point& aPt,
                                 gfxFloat aICoordInFrame,
                                 gfxFloat aWidth,
                                 gfxFloat aAscent,