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33 lines
1.4 KiB
Markdown
33 lines
1.4 KiB
Markdown
## How big of a file can I transfer with Firefox Send?
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There is a 2GB file size limit built in to Send, however, in practice you may
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be unable to send files that large. Send encrypts and decrypts the files in
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the browser which is great for security but will tax your system resources. In
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particular you can expect to see your memory usage go up by at least the size
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of the file when the transfer is processing. You can see [the results of some
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testing](https://github.com/mozilla/send/issues/170#issuecomment-314107793).
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For the most reliable operation on common computers, it’s probably best to stay
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under a few hundred megabytes.
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## Why is my browser not supported?
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We’re using the [Web Cryptography JavaScript API with the AES-GCM
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algorithm](https://www.w3.org/TR/WebCryptoAPI/#aes-gcm) for our encryption.
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Many browsers support this standard and should work fine, but some have not
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implemented it yet (mobile browsers lag behind on this, in
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particular).
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## How long are files available for?
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Files are available to be downloaded for 24 hours, after which they are removed
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from the server. They are also removed immediately after a download completes.
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## Can a file be downloaded more than once?
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Not currently, but we're considering multiple download support in a future
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release.
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*Disclaimer: Send is an experiment and under active development. The answers
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here may change as we get feedback from you and the project matures.*
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