this post was submitted on 17 Apr 2026
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Privacy

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I wonder if they're using my data to something or spying on me.

Because I use Firefox Sync to sync mostly my history. I don't have bookmarks, I just remember what site I want to access by its URL then I start typing and the autocomplete do the rest.

For example, to access Lemmy I just type "le" because the only site I most access and starts with "le" is "lemmy.world". Rarely I get some conflict on this approach. And it works on both my phone and desktop.

I wonder if should I change this approach to avoid Firefox Sync or I can trust on Firefox Sync.

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[–] kylekatarn@lemmy.world 48 points 2 days ago (1 children)

Securing your data with Sync involves creating a unique password, which plays a crucial role in encrypting your data for complete privacy. This encryption is end-to-end: your data is encrypted before it ever leaves your browser and can only be decrypted by another instance of Firefox. Once your data reaches a Mozilla-operated server for storage, it's already in an encrypted state, ensuring that not even Mozilla can access or decrypt this information.

support.mozilla.org/en-US/kb/sync

[–] pokeman@piefed.zip 31 points 2 days ago* (last edited 2 days ago) (2 children)

Adding on to this, you can also self host your own sync server
https://mozilla-services.github.io/syncstorage-rs/how-to/how-to-run-with-docker.html

(Oops looks like this got sent late and someone else sent it before mine got thru)

[–] Danitos@reddthat.com 5 points 2 days ago

TIL. Adding it to my to-do list. Thanks!

[–] IratePirate@feddit.org 3 points 2 days ago* (last edited 2 days ago) (1 children)

Oh, is this a thing again? Two years ago, they were doing a Rust rewrite; the rewrite had hardly any documentation, so self-hosted FF sync was essentially dead. Is this the new thing?

[–] pokeman@piefed.zip 4 points 2 days ago (1 children)

This is the same rewrite! Before there were really only community made images, but I believe a couple months ago is when they started pushing out their own + documentation. It really makes the server a LOT more easier to host than before :)

[–] IratePirate@feddit.org 5 points 2 days ago* (last edited 2 days ago)

That is fantastic news! Thanks for the update!