--- a/gfx/src/TiledRegion.cpp
+++ b/gfx/src/TiledRegion.cpp
@@ -9,17 +9,17 @@
 #include <algorithm>
 
 #include "mozilla/fallible.h"
 
 namespace mozilla {
 namespace gfx {
 
 static const int32_t kTileSize = 256;
-static const size_t kMaxTiles = 100;
+static const size_t kMaxTiles = 1000;
 
 /**
  * TiledRegionImpl stores an array of non-empty rectangles (pixman_box32_ts) to
  * represent the region. Each rectangle is contained in a single tile;
  * rectangles never cross tile boundaries. The rectangles are sorted by their
  * tile's origin in top-to-bottom, left-to-right order.
  * (Note that this can mean that a rectangle r1 can come before another
  * rectangle r2 even if r2.y1 < r1.y1, as long as the two rects are in the same