A friend asked me how to backup her emails in Mozilla Thunderbird. Well, the question is simple and she can find the solution from Google but because she is too lazy and has not much knowledge about Thunderbird, so I helped her by installing MozBackup, a backup tool for Firefox and Thunderbird.
MozBackup is a software that can backup your emails, contacts, extensions, and Thunderbird settings into a single file. This file is transferable and you can restore your Thunderbird by using this file.
Let say if you want to format your PC and want to backup your emails in Thunderbird. Run MozBackup and it will create a file which contains your Thunderbird emails and everything you have ticked to backup. Keep that file in thumbdrive and format the PC.