I have been having trouble with synchronizing my contacts from Google to my Thunderbird Application. I was trying to use the import functionality given in the Thunderbird which to my surprise didn't work.
Then i found out one add on for it Zindus. All you have to do is click on this link download the add on file, then go to tools->Add on and click install and provide the path to the downloaded file. Now you have to provide your internet account settings and hit sync :) . This is definitely going in my top 10 application list on Ubuntu. BTW this has nothing to do with which version of linux or any other platform you are using.