I use Google calendar which is synced to Firefox calender. That bit works well, but the settings from Google calendar aren't carried over - I have entries on Google that are different colours and these colours don't show on Firefox. I could cope with that, but every time I confirm or edit an entry through Firefox, it changes the colour assigned to the entry to the default colour which in turn syncs to Google and changes the colour.

How do I stop this? Can I have the entry colours synced to Firefox?