Mozilla has launched Firefox Send, a free file sharing service where users can upload files to the service and then share the URL with others. Users can upload files up to 1GB at a time or create a free Mozilla account to upload up to 2.5GB. Once the files are uploaded, you can choose how many times the files can be downloaded by the recipient (up to 100 times) before the link expires. Alternatively, you can instead choose a time period (up to 7 days) after which the link automatically expires. To make it even more secure, you can add a password to the link and share the password...