Firefox Send was one of the nicest small tools on the web. You dropped a file in, chose when it should expire and how many downloads it allowed, and got a link. The file was end-to-end encrypted in your browser, so Mozilla could not read it. It was free, and you did not need an account for small files.
Mozilla took it offline in 2020 and later discontinued it for good. Many people are still looking for something that feels the same.
What made Firefox Send different
Three things stood out:
- End-to-end encryption. The key lived in the part of the link after the
#, which browsers do not send to the server. - Expiry and download limits. Links cleaned themselves up.
- No clutter. One page, one job.
No single replacement matches all three exactly, so the right choice depends on which of those mattered most to you.
Be clear on encryption first
This is the most important difference, so it comes before anything else.
Enzonic Send is not end-to-end encrypted. Files are encrypted in transit with TLS and encrypted at rest on Cloudflare's network, but the encryption keys are held by the service rather than only by you and the recipient. That is the same model most mainstream transfer services use, and it is fine for everyday files: photos, documents, project folders.
If you used Firefox Send specifically because of end-to-end encryption, for example for medical records, legal documents or anything you would not want a provider to be able to read, choose a tool that is end-to-end encrypted. Wormhole is a well-known option.
Replacements by priority
If end-to-end encryption is the priority: Wormhole
At the time of writing, Wormhole:
- encrypts files end to end in the browser,
- stores files up to about 5 GB for 24 hours, and
- handles larger files peer-to-peer, which means the sender has to keep the tab open until the recipient finishes.
Plans change — check their site for current limits.
If expiry and download limits are the priority: Enzonic Send
This is the part of Firefox Send that Enzonic Send matches most closely:
- Expiry: 1 hour, 1 day or 3 days without an account; up to 7 days when signed in.
- Download limit: 1, 5, 10, 50 or 100. See also the file.io alternative page for one-download sharing.
- Optional password, which you can share separately from the link. More in password-protected file sharing.
- Manual delete at any time.
If simplicity is the priority
Both of the above are single-page, no-install tools. Enzonic Send also adds a 6-digit code and a QR code to every transfer, so a receiver can type the code at send.enzonic.com/receive instead of copying a long URL.
Side by side
| Firefox Send (until 2020) | Wormhole (at the time of writing) | Enzonic Send | |
|---|---|---|---|
| Status | Discontinued | Active | Active |
| End-to-end encrypted | Yes | Yes | No (TLS in transit, encrypted at rest) |
| Account needed | Not for small files | Check their site | No, up to 500 MB |
| Max size | No longer relevant | About 5 GB stored; larger via P2P | 500 MB anonymous, 2 GB signed in |
| Expiry | User-chosen | 24 hours for stored files | 1 hour to 3 days; up to 7 days signed in |
| Download limit | Yes | Check their site | 1, 5, 10, 50 or 100 |
| Share by code or QR | No | Check their site | 6-digit code and QR on every transfer |
Where Enzonic Send falls short of Firefox Send
To be plain about it:
- No end-to-end encryption, as covered above.
- Smaller files without an account. The anonymous cap is 500 MB, and the maximum is 2 GB even with a free account.
- Ads. Firefox Send had none; Enzonic Send is ad-supported, which is how it stays free.
- A lower size ceiling. Firefox Send allowed larger files when signed in; Enzonic Send stops at 2 GB.
Where it goes further
- Codes and QR for handing files to someone in the same room or on a call.
- Folders. Drag a folder in and it is zipped in the browser with its structure kept. See sending a folder online.
- Mobile apps for Android and iOS with QR scanning.
Using it the Firefox Send way
- Drop the file on the uploader above. On iPhone, tap it in Safari and choose Photo Library or Browse; on Android, use the Chrome file picker.
- Set the expiry and download limit the way you used to.
- Add a password for anything private.
- Share the link, or the 6-digit code.
That gives you the self-cleaning link you remember, without an account for files up to 500 MB. Just pick Wormhole or another end-to-end encrypted tool when the content needs it.
FAQ
Why was Firefox Send discontinued?
Mozilla took Firefox Send offline in 2020 after reports that it was being abused to distribute malware, and then announced it would not return.
Is Enzonic Send end-to-end encrypted like Firefox Send was?
No. Enzonic Send encrypts files in transit (TLS) and at rest, but it is not end-to-end encrypted. If you need end-to-end encryption, use a tool built for it, such as Wormhole.
Does Enzonic Send have expiry and download limits like Firefox Send?
Yes. You can choose 1 hour, 1 day or 3 days (up to 7 days signed in), and a download limit of 1, 5, 10, 50 or 100. You can also add a password.
What is a good end-to-end encrypted alternative?
Wormhole is a popular option. At the time of writing it stores files up to about 5 GB for 24 hours, and larger transfers go peer-to-peer while the sender keeps the tab open.
Can I still use the old Firefox Send links?
No. The service and its stored files are gone, so old links no longer work.
Updated 2026-10-17