How about trying the process to find out. Some of us do not have the option in windows 11.  :-/ Just click the button and see what the process is.

Hi,

Yes, that should definitely work, as long as the backup feature is available to you. However, please note, that it's a backup of your data, not Firefox in a whole, so you'll still have to download an installer from firefox.com and run it on your new machine, and only then use the backup to restore your data.

For reference, please see Restore your Firefox browsing data with a backup file.