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Problem with login-page after update

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After update to 113.0.2 I face a problem with the login-page of a bank. Windows 10 Pro 21H2 19044.2965 (64bit) The page I get you can see by enclosed screenshot. With the version 110.0.1 there is no problem to get access. The website owner assumed a pop-up blocker or VPN (not used) as a reason. Can you help? Kind regards, Michael

After update to 113.0.2 I face a problem with the login-page of a bank. Windows 10 Pro 21H2 19044.2965 (64bit) The page I get you can see by enclosed screenshot. With the version 110.0.1 there is no problem to get access. The website owner assumed a pop-up blocker or VPN (not used) as a reason. Can you help? Kind regards, Michael
Attached screenshots

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Hi Michael, if you read the actual text, ignoring the \r\n (line break commands), does it make sense that this is a page from the bank, or does it look like a potential attack page?

Assuming it looks like an actual bank page that Firefox has completely misinterpreted -- it is showing you the raw text of JSON data intended to be used in a script to build the page -- hmm, I don't know why that is happening.

In case you haven't tried "the usual," these are standard suggestions to try when it stops working normally (and the operator hasn't told you it only works in Chrome now):

Double-check content blockers: Firefox's Tracking Protection feature, and extensions that counter ads and tracking, may break websites that embed third party content (meaning, from a secondary server).

(A) The shield icon toward the left end of the address bar usually turns a bit purplish when content is blocked. Click the icon to learn more or make an exception. See: Enhanced Tracking Protection in Firefox for desktop.

(B) Extensions such as Adblock Plus, Blur, Disconnect, DuckDuckGo Privacy Essentials, Ghostery, NoScript, Privacy Badger, uBlock Origin or uMatrix may block required elements on a site. Usually you can find a toolbar button for each add-on to manage blocked content in a page. There may or may not be a number on the icon indicating the number of blocked items; you sometimes need to click the button to see what's going on and test whether you need to make an exception for this site.

Cache and Cookies: When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.

(1) Clear Firefox's Cache

See: How to clear the Firefox cache (only select Cached web content, don't clear all cookies and site data)

If you have a large hard drive, this might take a few minutes.

(2) Remove the site's cookies (save any pending work first). While viewing a page on the site, click the lock icon at the left end of the address bar. After a moment, a "Clear Cookies and Site Data" button should appear at the bottom. Go ahead and click that. Firefox will ask you to confirm; go ahead and confirm.

Then try reloading the page. Does that help?

Testing in Firefox's Troubleshoot Mode: In this mode, Firefox temporarily deactivates extensions, hardware acceleration, any userChrome.css/userContent.css files, and some other advanced features to help you assess whether these are causing the problem.

If Firefox is running:

You can restart Firefox in Troubleshoot Mode using either:

  • "3-bar" menu button > Help > Troubleshoot Mode... (before Fx88: Restart with Add-ons Disabled)
  • (menu bar) Help menu > Troubleshoot Mode... (before Fx88: Restart with Add-ons Disabled)

and OK the restart. A small dialog should appear. Click the Open button (before Fx88: "Start in Safe Mode" button).

If Firefox is not running:

Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.) A small dialog should appear. Click the Open button (before Fx88: "Start in Safe Mode" button).

Note: Don't use the Refresh without first reviewing this article to understand what will be deleted: Refresh Firefox - reset add-ons and settings.

Any improvement?