I was pointed to this list as the place to raise my concerns by an
acquaintance at Mozilla after I expressed my unhappiness about the new
FF sync. I hope that is true. I have looked over the complete archive
and there is no discussion of the decision to move to a new sync model.
The list appears to have been created post-decision.


I believe Mozilla is making a very bad decision in changing FF sync. The
onepw white paper
(https://github.com/mozilla/fxa-auth-server/wiki/onepw-protocol)
identifies a number of weaknesses several of them arising due to storage
on the server of the "wrapped" sync encryption key. Since sync will be
storing all my other passwords, any weakening is a grave concern. Has
Mozilla read the newspapers lately? Has Mozilla heard of the NSA? In
this age of mass surveillance by powerful government agencies backed up
by secretive court orders any cloud service that stores the encryption
key for my data in *any* form on it servers is a threat.

The paper then claims

"These weaknesses are the result of compromises. The features obtained
in this bargain are:

    recover account data (with the password) after losing your only device
    add a new device without access to an old device
    use slow/old clients (rather than doing expensive scrypt stretching
client-side)
    generalized Firefox Accounts, with more features than just Sync"

The first and second are both possible with old sync provided one has
the "recovery key". I have personally done the second. As for the third,
I never noticed any particular delay on the mobile devices I have
sync'ed or on my old and slow XP system.

That leaves the last. In order to provide this feature of questionable
utility, Mozilla is requiring me to go through an immense amount of
trouble to switch to the new sync while weakening my security. It would
be *much* less trouble and more secure to simply create another account
to get "more features."

Since Mozilla has managed to time arrival of this feature with Microsoft
ending support for XP, I don't even have the option continuing to use
old sync because I I have to get a new computer and you have removed the
UI for connecting a new device to old sync.

The strong security of FF sync is one of the main reasons I use FF and
something that applied pressure on Mozilla's competitors to do
likewise.  The link I followed from the pop-up notice in FF mobile beta
about new sync says nothing about security. This makes one think Mozilla
is no longer concerned about sync security, forces people to hunt for
further information, and it weakens the pressure on Mozilla's competitors.

I would have preferred Mozilla invested the time in providing
Thunderbird with the same robust sync capability as Firefox with all my
contact information encrypted.

Please kill this new sync or at a minimum continue support for old sync
including leaving the UI in FF so new clients can still be added.

Regards

    -Mark


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