Wells Fargo statements are not opening in Acrobat anymore, opening in web browser

I haven't changed anything in Firefox Browser settings. But when I open a bank statement, it is opening in the firefox browser, not in Acrobat. For years it opened in Acrobat. I checked Firefox Settings - Downloads for .pdf and it is still set to open them in Acrobat application. I have toggled the options, but still will not open in Acrobat. I have rebooted PC and tried again, still not opening the .pdf in Acrobat. Please advise what I should do Thank you