Can't login using Firefox

I can't log in on any of ETC pages (forum, learning, etc) since some days ago using firefox browser (version 91.0.2).
I am using Safari andit works fine.
Any idea why this is happening?
MacBook Pro 2,5 GHz Quad-Core Intel Core i7

  • Awesome. Thank you! That definitely looks like it will be useful as those errors are the website failing to sign you in.

    Would you mind right clicking on that console area, and exporting those messages to a file (see below)

    If you could email that file to me at drew.fabian (at), it should be helpful in letting our web development team get to the bottom of what's happening.

    One other thing that might be worth trying in the meantime is disabling your adblocker while you try and sign in. I can't think of why the adblocker would be interfering with your login. But it's usually a good troubleshooting step when it comes to issues with websites.



  • File is sent. I'll disable the ad blocker again, but I definitely had it disabled for most of the other trouble shooting.



  • Hi Tom,

    One of the web developers for our main site took a look at this today and agrees you seem to have won some kind of unlucky login lottery. He tested on the same 92.0.1 build of firefox and couldn't replicate.

    The next thing we can try when you have some time is taking a network traffic capture of the sign in attempt.

    To do this, navigate to the sign on page, right click on the page and click "Inspect" like before.

    But this time you're looking for a "Network" tab

    Once you are on the network tab, enter your username and password and click the sign in button.

    You should see an entry pop up. Something like the below (sorry for size)

    If you right click on that entry you should have an option to "Save All As HAR"

    If you could send me that HAR file please, that should contain a lot more technical information about why the request is failing.

    Sorry again for all the hassle. Hopefully we can get to the bottom of this soon.



  • Just leaving a brief update here for anyone else watching this thread, as the issue seems to have been resolved after a few more emails between Tom and I.

    The root cause ended up being a subtle difference in how FireFox and Safari send HTTP headers with requests. A firewall rule was being triggered which was flagging the login attempts as malicious activity.

    The firewall rule itself was not applicable to our setup, and so we disabled the rule and the sign ins started working again.

    Warm Regards,