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!

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 on Android sync returns "could not sign in"

  • 1 nzaghachinzaghachi
  • 22
  • 1 view
  • Nzaghachi ikpeazụ nke guigs

more options

I have Firefox for Android beta v39 and Firefox for Android v38 installed on my phone (Lollipop 5.0.2) and no matter which one of these browsers I try, when i login for sync, it gives the message "could not log in".. I have v38 installed on my linux desktop and it works with the same credentials. I tried resetting the password also and that also doesn't help, as the problem still remains the same.. sync on desktop works and it doesn't work on Android. Any suggestions?

I have Firefox for Android beta v39 and Firefox for Android v38 installed on my phone (Lollipop 5.0.2) and no matter which one of these browsers I try, when i login for sync, it gives the message "could not log in".. I have v38 installed on my linux desktop and it works with the same credentials. I tried resetting the password also and that also doesn't help, as the problem still remains the same.. sync on desktop works and it doesn't work on Android. Any suggestions?

Asịsa ahọpụtara

I understand that Firefox for Android returns: "could not sign in" I am happy to help. Let's try a new login by removing the account first.

  1. First disconnect the account from the Android Settings under "Accounts"
  2. After tapping remove, open a new window in Firefox
  3. Go to https://accounts.firefox.com
  4. Sign in once more and make sure that in your Account Settings, that Data Usage is set to auto sync.

For troubleshooting, do you have any content blockers or proxies/filters on your device?

Gụọ azịza a na nghọta 👍 2

All Replies (1)

more options

Asịsa Ahọpụtara

I understand that Firefox for Android returns: "could not sign in" I am happy to help. Let's try a new login by removing the account first.

  1. First disconnect the account from the Android Settings under "Accounts"
  2. After tapping remove, open a new window in Firefox
  3. Go to https://accounts.firefox.com
  4. Sign in once more and make sure that in your Account Settings, that Data Usage is set to auto sync.

For troubleshooting, do you have any content blockers or proxies/filters on your device?