5 files changed, 8 insertions, 8 deletions
diff --git a/layout/generic/CSSAlignUtils.cpp b/layout/generic/CSSAlignUtils.cpp
index 4cbaccd52c..ec993faf1a 100644
--- a/layout/generic/CSSAlignUtils.cpp
+++ b/layout/generic/CSSAlignUtils.cpp
@@ -133,7 +133,7 @@ CSSAlignUtils::AlignJustifySelf(uint8_t aAlignment, LogicalAxis aAxis,
       }
       break;
     case NS_STYLE_ALIGN_STRETCH:
-      MOZ_FALLTHROUGH; // ComputeSize() deals with it
+      [[fallthrough]]; // ComputeSize() deals with it
     case NS_STYLE_ALIGN_START:
       offset = marginStart;
       break;
diff --git a/layout/generic/nsFlexContainerFrame.cpp b/layout/generic/nsFlexContainerFrame.cpp
index d60308f424..2fc90e9da9 100644
--- a/layout/generic/nsFlexContainerFrame.cpp
+++ b/layout/generic/nsFlexContainerFrame.cpp
@@ -3012,7 +3012,7 @@ MainAxisPositionTracker::
       case NS_STYLE_JUSTIFY_BASELINE:
       case NS_STYLE_JUSTIFY_LAST_BASELINE:
         NS_WARNING("NYI: justify-content:left/right/baseline/last baseline");
-        MOZ_FALLTHROUGH;
+        [[fallthrough]];
       case NS_STYLE_JUSTIFY_FLEX_START:
         // All packing space should go at the end --> nothing to do here.
         break;
@@ -3220,7 +3220,7 @@ CrossAxisPositionTracker::
       case NS_STYLE_ALIGN_BASELINE:
       case NS_STYLE_ALIGN_LAST_BASELINE:
         NS_WARNING("NYI: align-items/align-self:left/right/self-start/self-end/baseline/last baseline");
-        MOZ_FALLTHROUGH;
+        [[fallthrough]];
       case NS_STYLE_ALIGN_FLEX_START:
         // All packing space should go at the end --> nothing to do here.
         break;
@@ -3522,7 +3522,7 @@ SingleLineCrossAxisPositionTracker::
     case NS_STYLE_ALIGN_SELF_START:
     case NS_STYLE_ALIGN_SELF_END:
       NS_WARNING("NYI: align-items/align-self:left/right/self-start/self-end");
-      MOZ_FALLTHROUGH;
+      [[fallthrough]];
     case NS_STYLE_ALIGN_FLEX_START:
       // No space to skip over -- we're done.
       break;
diff --git a/layout/generic/nsFrame.cpp b/layout/generic/nsFrame.cpp
index a4d4427f69..0d00a35865 100644
--- a/layout/generic/nsFrame.cpp
+++ b/layout/generic/nsFrame.cpp
@@ -7735,7 +7735,7 @@ nsIFrame::PeekOffset(nsPeekOffsetStruct* aPos)
         aPos->mWordMovementType = eEndWord;
       }
       // Intentionally fall through the eSelectWord case.
-      MOZ_FALLTHROUGH;
+      [[fallthrough]];
     case eSelectWord:
     {
       // wordSelectEatSpace means "are we looking for a boundary between whitespace
diff --git a/layout/generic/nsGridContainerFrame.cpp b/layout/generic/nsGridContainerFrame.cpp
index 1e1afac234..5cc8189e94 100644
--- a/layout/generic/nsGridContainerFrame.cpp
+++ b/layout/generic/nsGridContainerFrame.cpp
@@ -4938,7 +4938,7 @@ nsGridContainerFrame::Tracks::AlignJustifyContent(
     case NS_STYLE_ALIGN_BASELINE:
     case NS_STYLE_ALIGN_LAST_BASELINE:
       NS_WARNING("NYI: 'first/last baseline' (bug 1151204)"); // XXX
-      MOZ_FALLTHROUGH;
+      [[fallthrough]];
     case NS_STYLE_ALIGN_START:
       distribute = false;
       break;
diff --git a/layout/generic/nsLineLayout.cpp b/layout/generic/nsLineLayout.cpp
index 579c4ae0b0..90ce6b089f 100644
--- a/layout/generic/nsLineLayout.cpp
+++ b/layout/generic/nsLineLayout.cpp
@@ -3009,7 +3009,7 @@ nsLineLayout::ExpandRubyBox(PerFrameData* aFrame, nscoord aReservedISize,
       }
       // If there are no justification opportunities for space-between,
       // fall-through to center per spec.
-      MOZ_FALLTHROUGH;
+      [[fallthrough]];
     }
     case NS_STYLE_RUBY_ALIGN_CENTER:
       // Indent all children by half of the reserved inline size.
@@ -3201,7 +3201,7 @@ nsLineLayout::TextAlignLine(nsLineBox* aLine,
         }
         // Fall through to the default case if we could not justify to fill
         // the space.
-        MOZ_FALLTHROUGH;
+        [[fallthrough]];
       }
 
       case NS_STYLE_TEXT_ALIGN_START: