Don't worry, it's not as complicated as you think
How to Transfer a Firefox Profile to a New Computer (How to Properly Migrate a Firefox Profile)
So you've scored a new Windows machine. Congratulations! But now comes the annoying part: Firefox profile migration.
You are now tasked with migrating your web browser profile to your new computer. Where do you even begin, right? Well, don’t worry. It’s not as complicated as you might think.
In this post, you'll learn how to copy your Firefox settings from one PC to another. You can create a Firefox Account and use that to sync your data across devices, but this article is for those who prefer to keep their private data locally.