Browser extension
Auto-sync on Canvas visits
Turn on auto-sync and simply loading a Canvas page runs a quiet background sync for the classes and data types you've chosen.
Turn it on
In the extension's Settings, enable Auto-sync on Canvas visit and set how often it may run (the minimum interval). Pick which classes opt in from the Sync tab. The panel doesn't need to be open; only the data types you've enabled are synced.
Tip. Set sensible defaults for new classes under Default sync settings, then fine-tune each class individually.