Which is better? SegFault or Puter (Disposable Root Servers)

A completely cloud host can bypass all fingerprints, I think this is more anonymity to than any local browser, But I’m worried that my cookies will be stolen, Are my worries necessary?
By the way, They are all open source: SegFault and Puter
Which one should I use? or just keep use local browser?

As long as you can selfhost it, you are probably safe if you trust VPS provider.