Hi, I'm very satisfied with Thunderbird at home but at work I have to use Outlook 2013 and I don't feel very comfortable with it. So I would like to put a portable version of Thunderbird on an USB key to use it without install. Going on the official Mozilla website I don't see any portable version (also if this version is quite famous on the web). It is not officially released by Mozilla? I found a portable version on the website http://portableapps.com but I don't know this website and I'm not sure that I can trust that "hacked" version (malwares/spywares included? Who knows?). Is there a TB portable version officially released and supported by Mozilla? If yes where can I found it? Thanks in advance. Best regards,