"Although we develop our services in ways to minimize identification, you should know that it may be possible to correlate the IP address of a Send user to the IP address of other Mozilla services with accounts; and if there is a match, this could identify the account email address", Mozilla informs.
Unlike most other file sharing services, Firefox Send doesn't encrypt users' data after it arrives on the company's servers (thus allowing the company itself or anyone with access to that company's servers to see what's in the files), but before, on the user's local machine. "As with all Firefox apps and services, Send is Private By Design, meaning all of your files are protected, and we stand by our mission to handle your data privately and securely". You can set the link to expire after a set number of downloads, or after a certain period of time. "If you choose a download cap, the file can be deleted from out server sooner".
The files can be uploaded one at a time or in batch, which Firefox Send automatically assembles in one big ZIP file. 'Sending files over the internet is something many of us do everyday.
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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.
Firefox Send is free for anyone to use.