Jigsaw World doesn't demand downloading any programs or plugins to play. Jigsaw Planet does permit buyers to sign up for a free web page membership but this is not required to play the puzzles and is simply used to rate the ones that you prefer or dislike. Take a look https://hard-jigsaw-puzzles-onlin24680.kylieblog.com/33581916/new-step-by-step-map-for-online-jigsaw-puzzles-for-kids