Hi. Thanks for reporting this. Not sure exactly what is happening in your case. The sync feature uses your local storage. That means as long as you don't delete the extension, the chats should already be there once they are synced for the first time. Restarting browser should not reset your sync state. If this issue keeps happening, feel free to join our Discord to share some screenshot and get faster support https://discord.gg/Ma9VpTSct2