Your entire email history, saved passwords, and extensions stay within the folder, meaning no reconfiguration is needed when you switch PCs.
It leaves no personal data or registry entries on the host machine. thunderbird portable english download
Because your data is stored locally on your own drive, you avoid the risks of leaving cached emails on public or shared computers. How to Download Thunderbird Portable English Your entire email history, saved passwords, and extensions
ARTICLE: Thunderbird Portable (Mozilla ... - Mozilla Support Your entire email history
The most trusted source for this version is PortableApps.com , which provides the officially packaged portable edition in English.
Unlike the standard desktop version, the portable edition does not require a traditional installation on the host computer. This offers several unique advantages: