WeTransfer extension for Thunderbird

An upcoming version of Thunderbird will ship with a WeTransfer provider 
for Thunderbird's "cloud file" feature, which uploads large attachments 
to a website rather than sending them with the message. WeTransfer is a 
popular web service and users can send files of up to 2GB using it.

For now, this feature is very simple (five strings!). We've already had 
20-something translations added, so thank you to everybody who has 
contributed.

https://pontoon.mozilla.org/projects/thunderbird-wetransfer-extension/