Just to add some observations:
I have a problem to add/use a Google Calendar in Lightning. Defining a
calendar (which is available with other service and also using an
Android Smartphone) these errors are thrown:
> ----------
> Fehler: Component returned failure code: 0x804b000a
(NS_ERROR_MALFORMED_URI) [nsIIOService2.newChannelFromURI]
> Quelldatei: resource://calendar/modules/calProviderUtils.jsm
> Zeile: 29
>
> -- this is ---
> 28 cal.prepHttpChannel = function calPrepHttpChannel(aUri,
aUploadData, aContentType, aNotificationCallbacks, aExisting) {
> 29 let channel = aExisting ||
cal.getIOService().newChannelFromURI(aUri);
>
> ----------
> Warnung: Fehler beim Lesen von Daten f�r Kalender:
{--calendarName--}. Allerdings ist dieser Fehler wahrscheinlich
vernachl�ssigbar, daher versucht das Programm fortzufahren. Fehlercode:
DAV_NOT_DAV. Beschreibung: Die Ressource auf
https://www.google.com/calendar/dav/{--login1--}@googlemail.com/events/
ist entweder keine DAV-Sammlung oder sie ist nicht verf�gbar
> ----------
I'm using another Google Calendar which works well :
https://www.google.com/calendar/dav/{--login2--}@googlemail.com/events/
For the second calendar it was necessary to enter login details, but
after restart it wasn't asked again.
(and yes I stored un/pw with TB PW manager).
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106
Thunderbird/17.0.2 -- 20130106044124
Lightning 1.9