User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1 Build ID: 20110928134238 Steps to reproduce: Kept getting error bar indicating sync issues. Removed sync account, then attempted to perform setup again. Actual results: Attempting to use the "Add a Device" dialog, when I enter the three sets of characters on the other device, the other device just report "Please try again" and the characters change on the device I am attempting to setup. Attempting to enter the account information manually (email address, password, sync key), when I click next the little progress icon appears briefly then goes away, but the dialog will not continue. Expected results: Browser should have been added to the existing sync account, or an error message displayed.

podge: are you running in FIPS mode? http://support.mozilla.com/en-US/kb/Configuring%20Firefox%20for%20FIPS%20140-2

Yes I am in FIPS mode (step 2 in the linked document). Although I haven't followed all those steps to disable the older SSL versions/ciphers (steps 1&3 in the linked document).

(In reply to podge from comment #2) > Yes I am in FIPS mode (step 2 in the linked document). Although I haven't > followed all those steps to disable the older SSL versions/ciphers (steps > 1&3 in the linked document). Sync doesn't work in FIPS mode; see Bug 443386. Apparently neither does the J-PAKE setup flow. This is not a big surprise. Please try again with FIPS mode disabled. If that gets you moving, I'll dupe this.

That seems to fix it. Disabling FIPS, then setting up sync works. Re-enabling FIPS afterwards, and I get the same errors again and can't sync anymore.

Well that's annoying, it's a more than 3 year old bug but sync still doesn't have an error message to tell you it won't work. Sorry to have taken up your time with it.

(In reply to podge from comment #6) > Well that's annoying, it's a more than 3 year old bug but sync still doesn't > have an error message to tell you it won't work. Yup, afraid so. It affects only a tiny minority of users, so it hasn't really been a product priority. Patches welcome :) > Sorry to have taken up your time with it. Not a problem!