You can use the Sync service. These articles have more information about how it works and how to control what data is copied between your devices:

• How do I set up Sync on my computer?
• How do I choose what information to sync on Firefox?

Knittymama61 said

How do I do that

you can't do it simply..it's actually a joke that Firefox won't even let you create folders on it's android version..it's great for laptop/desktop but use something like Dolphin for android..

Hi Gregory1111, someday there will be folder support on Android, I hope! But you are correct that currently there is not. Each user has to decide for herself/himself whether that limitation is a deal-breaker.