User Agent: Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101 Firefox/31.0 (Beta/Release) Build ID: 20140716183446 Steps to reproduce: 1. Open Thunderbird after a fresh start of Windows or a resume from hibernate state (S4). 2. Go to Lightning and trigger synchronization of all calendars manually (right click > Sync calendars in the list of calendards) OR wait for some time so Lightning triggers the synchronization of its calendards automatically Actual results: Every 1-2 days the Google credential window pops up asking for my credentials and access to my calendards - even though I already entered them 1-2 days befor Expected results: Credentials and calendar access should have been remembered by Lightning from the previous sessions. Prior to Lightning 3.3 I only had to _confirm_ the access every 1-2 days (= I didnt need to enter the credentials too). Now with 3.3, I have to enter the credentials AND grant access. So the solution in Bug #1000535 actually made it worse. My setup: * Thunderbird 31.0 running on Windows 7 SP1 32bit with the latest Lightning (3.3) * I have 2 Google calenders included in Lightning. Both set up as CalDav, caching disabled. The URLs I used are like "https://email@example.com/events". * I don't use (and never did) that "Provider for Google Calendar" add-on * Add-ons enabled in TB: Google Contacts 0.7.12, Lightning 3.3, Minimze on Start and Close 1.3.2 * Don't know whether it's important, but I usually do not shut down Windows but rather send it to Hibernate (S4). * TB's error console doesnt show any errors, just a few warnings about getAttributeNodeNS being deprecated.