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Can no longer sign in to particular website using Firefox Browser

IanM

The website in question is https://accounts.groceries.morrisons.com/auth-service/sso/login

If I use with the same username and password in MS Edge, I can successfully login. I'm usng the Dashlane Password Mananger

FF 129.0.1 Edge 127.0.2651.105 OS Windows 11 Pro v 24H2 Build(26100.1457)

The website in question is https://accounts.groceries.morrisons.com/auth-service/sso/login If I use with the same username and password in MS Edge, I can successfully login. I'm usng the Dashlane Password Mananger FF 129.0.1 Edge 127.0.2651.105 OS Windows 11 Pro v 24H2 Build(26100.1457)
Läs svaret i sitt sammanhang

Vald lösning

Add-ons used a) Dashlane & b) Malwarebytes Broswer Guard

1) With both (a) & (b) installed issue is still present; 2) with only (b) installed, issue still present; 3) with only (a) installed, issue NOT present

So the MalawareBrowser Guard is the root cause of the issue.

Thank you for your help,

Alla svar (9)

We need a postal code to replicate.

Thanks. Let me try to register and see what happens.

It works for me. I was able to register, login, logout, and log back in. see screenshots You need to show the issue. Just saying there's an issue doesn't help us help you. Do you have the same issue with Firefox in Troubleshoot Mode?

No!! It worked OK in Troubleshooter Mode!!

Still doesn't work in non-troubleshooter mode

Maybe Malwarebytes Browser Guard.

If it works in Troubleshoot Mode and in regular mode with all extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) disabled, try to find which extension is causing the problem by enabling one extension at a time until the problem reappears.

Close and restart Firefox after each change via one of these:

  • "3-bar" menu button -> Exit (Power button)
  • Windows: File -> Exit
  • Mac: Firefox -> Quit Firefox
  • Linux: File -> Quit

Vald lösning

Add-ons used a) Dashlane & b) Malwarebytes Broswer Guard

1) With both (a) & (b) installed issue is still present; 2) with only (b) installed, issue still present; 3) with only (a) installed, issue NOT present

So the MalawareBrowser Guard is the root cause of the issue.

Thank you for your help,