Google Chrome Extensions are not Syncing

The issue is known: Issue 170107

The solution is to go to Extensions, enable Developer mode and press Update extensions now. That will immediately pull all the extensions for your account.

Give it some time. As far as I remember when I first tried the sync feature, It took around 15 minutes and then the new extensions magically appeared.

First time is always slow because its getting all your bookmarks plus the extensions. Next few times will be super fast.