Telega is of course correct.

However I would strongly recommend that you also consider well the use of the excellent extension FEBE, and make a full Profile Backup of your Firefox Profile.

Works a treat.

Then when you have reformatted your drive, and have Firefox working again, simply restore your Full Firefox Profile Backup.

Works really well and is easy to do

Then you will have all your extensions, all your settings, all your Bookmarks. Everything.
An almost perfect clone.

And yes your Fast Dial will be there as well of course. :-)

Many thanks