Review for Provider for Google Calendar by Firefox user dc7eb2
Rated 5 out of 5 stars
It took me a little, but this is very cool and once setup very stable. Good job!
It's a combination of this add on
Enable a public share of your calendar.
Copy the URL of your calendar.
Follow the directions at Google Help for "Get Started with CalDAV"
You can even export your default "Home" Calendar and import it into Google.
Once you play around with the public vs private viewing it's all set. So now you can use Gcal as the host and Mac/iPhone/blackberry/PC whatever as reader clients.
To create your own collections, you must have a Mozilla Add-ons account.