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gcontactsync still not working for me. I tried to follow the suggested edit to install.rdf. It gets saved, but then when I restart contactsync, it always reverts to the old version.

Suggestions (aside from walking away)?

Questa recensione riguarda una versione precedente (3.0.0) del componente aggiuntivo. 

This add-on does not work properly in TB 60.0 and later. I'm tracking my progress towards supporting 63+ in https://github.com/jdgeenen/gcontactsync/issues/121. Thunderbird's rate of making breaking changes has outpaced my spare time, so your patience is appreciated.