Hello there 
being a “spoiled” Windows XP user for many years, and later by obligation, since XP did not get support any more Windows 8 Pro, I got Zorin core 15.3 on a bootable stick already tempting to install it.
So far I have been using PaleMoon browser as my default browser, wanting to continue to do so, as it is almost working as great as Firefox version 25 once was.
Is it possible to install PaleMoon on Zorin?
Apart from that I am using Thunderbird as my E- Mail program.
Using it also for years and being happy with it, I also want to continue using it.
Now, the big question is:
How do I migrate all my files and settings (even incl. my last browser session) from Windows to Zorin?
On Windows there were some helpful programs I was downloading a couple of years ago, MozBackup and PMbackup, which did a good job saving everything, in case something would go wrong. Never made an external whole system backup on a separate storage device; I know this is not recommended. But I was lucky so far 
Would be happy if there were some helpful info’s and suggestions of how to best import all my stuff, especially for E- Mail and the mentioned browser ^^
Greetings from Berlin
Uwe