Форум поддержки Firefox

Recently my browser will open a Settings tab whenever I click on an autofill dropdown selection. Any autofill selection from username/passwords to simple Name/phonenumber/etc autofills. It's very annoying and I can figure out why it's doing it. How do I make it stop? I'm running Firefox 126.0.1 (64-bit) on a Windows PC.

Been using Firefox and predessors for 30 years. The problem: 1. I login to my Credit Union website "https://www.missionfed.com. 2. I AM able to get through the login and verification process, to the page where my accounts are shown. 3. Click on my checking account, and the icon rolls and rolls, and never gets past this point. 4. Access in this same manner has ALWAYS worked in the past. 5. I disabled all extensions, etc. There was only one anyway. Didn't help. 6. I ran troubleshooting / safe mode. Didn't help. 7. Cleared the cache, etc. Didn't help 7. I called the bank. The moment I mentioned Firefox, THEY SAID, IT'S A NEW PROBLEM WITH FIREFOX, WE'RE TELLING EVERYONE TO USE EDGE OR CHROME INSTEAD. That can't be good? 8. The bank said v.125 works fine and that v.126 is the problem. Any ideas?