Large number of pages don't open properly

Windows 10 laptop. Firefox 133.0.3 (64-bit). Lots of web pages over the last year don’t open or behave properly with Firefox, but work with Chrome and Edge.

Latest example:

Just checked a gift card balance at https://www.jerseymikes.com/gift-cards/get-balance

Enter as gift card number 6303 5114 5830 1033

Click Get Balance. Nothing happens. On Chrome, the balance of $0.00 appears in the web page just above the gift card number field.

Not a popup, but I have turned off the disabling of pop-up windows just in case.

I can add more examples as they happen, but I would be amazed if others have not been encountering similar problems.

Here is a screenshot of how it looks on Chrome when it updates the page: