Gmailchecker 2-step verification

Tuesday, 4 August 2015

I haven't got time to verify any changes regarding Gmail's 2-step verification. I'll look into it as soon as I've got a chance.

Update 21/12/2015: Extension Verification

If the extension got disabled on your Firefox due to not being verified. Please reinstall it from the website (

Posted at 09:53 pm in Firefox


  1. Thank you for your time.
    by prokofjev on Thursday, 6 August 2015, 05:50 pm #
  2. Yes thanks. Mine is working ok but I appreciate your efforts.
    by fred on Thursday, 3 September 2015, 07:14 am #
  3. Hello -- I don't know if you are aware of this;but the count numbers for each email address,when you right-click on the icon,have disappeared.I hope you bring them back,with your next update.I know you're busy,so no rush to do this.Thank you for this great extension.
    by psk715 on Tuesday, 22 September 2015, 12:26 am #
  4. Gmail Checker 2.6.6 seems to be causing FireFox 41.0.02 to crash when I log out of my Gmail.
    by FireFoxy on Tuesday, 20 October 2015, 11:47 am #
  5. Hello,
    can you tell me some details on the SSL checkbox?
    Is it secure to use?
    Or leave that check box empty?
    If I tick it, enable SSL and logging in than Google sends security e-mail, that an application is trying to log in with the right password but in an unsupported or unsecure way. So they prevent login.
    What is this and why do I get this e-mail?

    by Peter on Sunday, 25 October 2015, 05:40 pm #
  6. Hi.

    Just started using your extension this weekend when the old, old, old gmail-manager seemed to completely block Firefox. Your seems a neat and compact version.

    I'm also having same problem as Peter with the security emails, I even switched off SSL but they still come. Odd as Gmail clearly allows the extension to check for mail but just seems to throw this up every so often and then carries on allowing access quite happily.

    Many thanks for your time and effort.
    by Ian-S on Tuesday, 27 October 2015, 01:14 am #
  7. Hello,
    Is it possible to make a little bigger icon for gmail checker?
    by Przemek on Tuesday, 27 October 2015, 12:43 pm #
  8. Mozilla 43.0 has disabled your plugin because it can't be verified :(. Can you fix ? Th'x !
    by LL43 on Tuesday, 15 December 2015, 06:39 am #
  9. go to about:config , search for


    set it to false

    Restart Firefox !

    Done !

    by Karl on Wednesday, 16 December 2015, 10:32 am #
  10. Is it wise to disable the signature verification setting? Does it really make the browser more secure or is it just lipservice from mozilla? Does this also mean that any addons that are not offered on mozilla's site will be considered unsecure and disabled?
    by bud on Wednesday, 16 December 2015, 05:48 pm #
  11. Hi,
    After last update I don't see the counters of new posts in the context menu. Is it possible to fix it? Please help, if so. Thanks.
    Firefox 43.0.1
    by vic on Sunday, 20 December 2015, 02:33 pm #
  12. I recently installed Gmail Checker (2.6.6) for the first time, but I am unable to use it because the Manage Accounts window will never open for me. I have 2-factor verification turned on so I need to use that window to setup my account, but whenever I click to open it it shows up for a second and then immediately disappears. I attempted opening the dialog with the Debug Window open, but nothing was logged.

    P.S. I tried turning off 2-factor verification temporarily and it lets me log in, but the Manage Accounts dialog still does not work.

    Firefox 43.0.4
    by lavendergooms on Friday, 8 January 2016, 05:17 pm #
  13. hi then gmail checker check the email its frozz the firefox.

    firefox 43.0,4
    by zirafin on Saturday, 23 January 2016, 10:10 am #
  14. Still can't get my 2-step ver account to work with the checker, hope you get the time to fix it. Thanks.
    by prok on Monday, 8 February 2016, 04:28 am #
  15. Hi, has the extension stopped working for anyone else recently?

    I get a connection error when I try to check any of my accounts.
    by Gmailer on Monday, 21 March 2016, 10:35 pm #
  16. Everything's working fine for me still :)
    by Stuart on Tuesday, 5 April 2016, 05:27 am #
  17. the addon 'Privacy Badger' was causing the issue, it seems it prevents the checker from accessing gmail.
    by Gmailer on Tuesday, 12 April 2016, 03:26 pm #
  18. Hi,

    I very much like your FF add-on, as it allows for / is supposed to allow for 2-factor authentication on my gmail accounts.

    Contrary to other FF add-ons, I should add to that.
    So hail thee!

    However, I am not able to connnect, though.
    YES - I read the Google instruction about creating an APP-SPECIFIC password. And so I did.
    ALSO - I have saved this password under Manage Accounts from within the FF-Addin.

    However - still I am NOT able to login to gmail at all. The small login screen (entered: email address + once more the App-specific OR normal gmail password).... this login screen symply keeps on popping-up, without ANY login taking place.

    What could be wrong??
    by Jimmy on Wednesday, 20 April 2016, 05:47 pm #
  19. Same issue as Jimmy, 2fa-enabled accounts cannot be logged into, even with an app-specific password.
    by Gmailer on Thursday, 30 June 2016, 01:10 pm #
  20. Same, it has not been working for a few months
    by Jimbo on Sunday, 3 July 2016, 06:57 pm #
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    by zzzzz on Tuesday, 11 April 2017, 10:04 am #
  23. From today morning i'm unable to login (not use 2 step verification). Think something has been changed again by google. Can you take a look ? Thank you !
    by LL45 on Friday, 5 May 2017, 01:42 pm #
  24. I have the same problem. I even uninstalled the GmailChecker and can not download it again at Mozilla. I have reinstalled the extension from my computer. Please look at the problem, it is such a wonderful program...
    Thank You :o)
    by Claudia on Friday, 5 May 2017, 05:30 pm #
  25. Same here. If you logout from an account it won't let you log back in.
    by me on Sunday, 7 May 2017, 09:35 am #
  26. Since Gmail's log-in interface has changed over the past few days, Gmail Checker 2.6.6 fails to log in.

    It has worked perfectly so far and made our lives easier.

    Kindly look into it and make it work so that your loyal users are not disappointed.

    I have looked into several such addons and nothing compares to Gmail Checker's simplicity and efficiency. Many thanks for this wonderful addon.
    by Daniel on Sunday, 7 May 2017, 12:22 pm #
  27. Since Gmail's log-in interface has changed over the past few days, Gmail Checker 2.6.6 fails to log in.
    by Bill on Thursday, 18 May 2017, 03:26 pm #
  28. This is weird. On one of my laptops it's still working ok but on the other it's broken. As others have said this is a brilliant add-on. please fix if possible asap. Thanks
    by Wok68 on Friday, 19 May 2017, 03:34 pm #

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