The new Mac Safari: Performace lower than Chrome's. If the game becomes technically intense (in example pretty much particles) - the game on the new Mac's Safari loses lots of FPS, while on Chrome it's still smooth and cool.
Update: Large bullet object (clouds in example) that moves slow also causes low FPS.
W10 Edge: Screenshots does not save (invoking download of CanvasSnapshot does not work)
and Audio looping lags a little, is not smooth.
W10 FF: Some sounds broken (looks like random sounds. Canâ€™t understand why some of them plays bad) see http://www.crystalgames.space/under and reproduce by crashing into black ghost. Compare it to Chrome to see the difference.
+Positioned sound also plays bad. Please see game http://www.crystalgames.space/saxmanhealer (lvl1 with crows)
Just letting know. It's up to Construct2 developers to what to do next.