Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox Sync alerts "Incorrect password or username" every time it starts.

  • 1 reply
  • 10 have this problem
  • 1 view
  • Last reply by Otiel

more options

Every time I start Firefox, I get the following error message from Sync:

"Sync encountered an error while connecting:Incorrect account name or password. Please try again. [Preferences]"


In my about:log-sync, these lines appear:

Sync.Service	DEBUG	Exception: Login failed: error.login.reason.account No traceback available
Sync.Service	DEBUG	Not syncing: login returned false.
Every time I start Firefox, I get the following error message from Sync: "Sync encountered an error while connecting:Incorrect account name or password. Please try again. [Preferences]" In my about:log-sync, these lines appear: <pre>Sync.Service DEBUG Exception: Login failed: error.login.reason.account No traceback available Sync.Service DEBUG Not syncing: login returned false.</pre>

Modified by Otiel

Chosen solution

Turns out that my Sync password was not correctly saved in Firefox. When I looked at my password saved in my Firefox profile (Options -> Security -> Saved passwords -> Show passwords) , some characters were different than the one I entered when I set up my account. For instance, there was an "©" instead of a "(".

I solved by it changing my password and using only "a-z" "A-Z" "0-9" characters.

(I filed a bug https://bugzilla.mozilla.org/show_bug.cgi?id=866586)

Read this answer in context 👍 1

All Replies (1)

more options

Chosen Solution

Turns out that my Sync password was not correctly saved in Firefox. When I looked at my password saved in my Firefox profile (Options -> Security -> Saved passwords -> Show passwords) , some characters were different than the one I entered when I set up my account. For instance, there was an "©" instead of a "(".

I solved by it changing my password and using only "a-z" "A-Z" "0-9" characters.

(I filed a bug https://bugzilla.mozilla.org/show_bug.cgi?id=866586)

Modified by Otiel