Sync isn't designed as a permanent backup – it's just sharing what is saved locally. If you reset your password and your data isn't stored on at least one other device, you could lose all the information associated with the old password. That's why you'll want to install Firefox and use Sync on more than one device.
同步不是为永久备份设计——它只共享您在本地保存的东西。如果您重置密码并且您的数据未存储在至少一台其他设备上，您可能会丢失与旧密码相关的所有信息。这就是为什么你应该在多台设备上安装 Firefox 并使用同步。