Mozilla Firefox Send lets you share encrypted files privately and for free

Judy Cobb
March 14, 2019

This week, the folks at Mozilla launched a neat new service called Firefox Send, which makes it easy to send larger files using end-to-end encryption at no cost. When you upload files to the website, you can choose a password and you can choose to have downloads expire either after X days or after X downloads - for example - you can upload a set of files to be available for download only for 7 days. Anyone can upload files up to 1GB in size, but users will need an account before they can upload files between 1GB and 2.5GB.

Firefox Send has been available as a "Test Pilot" experiment since August 2017, but it took Mozilla some time to iron out all the kinks and ensure that the service will work for more than a handful of people at a time. For those seeking extra privacy, shared files can also be locked with a passphrase.

Given that the files are encrypted and aren't stored, however, it's going to be ruddy hard for anyone to find out what you've sent anyway.

The service uses an algorithm known as AES-GCM-128 to encrypt and authenticate data on the sender's computer before uploading it to Mozilla servers. The recipient doesn't need a Firefox account to access your file.

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Users' files are first encrypted in the browser and then stored in the cloud, so Mozilla will have to pay for both the bandwidth and the storage of those files. The service, which will serve as a direct competitor to the publicly traded Dropbox, lets anyone quickly, and easily, share important files, before it gives them the disappearing Snapchat treatment, making them disappear forever into the dark void of the Internet.

Mozilla is also releasing a Firefox Send app for Android.

Below: Mozilla's brief video demonstrating Firefox Send.

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