Mozilla® Thunderbird is a freeware email client that has lots of features, including quick message search, customizable views, support for IMAP/POP, RSS support, etc. Mozilla Thunderbird®, Portable Edition is the popular Mozilla Thunderbird email client bundled with a PortableApps.com Launcher as a portable app.
PortableApps.com is a popular portable software solution allowing you to take your favorite software with you. A fully open source and free platform, it works from any synced cloud folder (DropBox, Google Drive, Box, etc), from your local PC on an internal or external drive, or on any portable storage device (USB flash drive, memory card, portable hard drive, etc) moved between PCs.
The portable version of Mozilla Thunderbird lets you store your email and address book on a removable drive so that you can take the data with you wherever you go.
In this article, we’ll see how to add or remove Mozilla Thunderbird, Portable Edition to Default Apps/Default Programs in Windows.