What did Mozilla do recently to screw up Firefox? On some websites (e.g., https://www.usbank.com/index.html and https://www.penfed.org/) which I commonly visit, I suddenly start getting error messages when I try to log in ("Your username and/or password are incorrect. Please try again." on the U.S. Bank website and just "FAIL" on the PenFed Credit Union website). I can log into both without any problems using the Chrome browser (which I don't like using). I have called both U.S. Bank's and PenFed's website support departments (having spent over an hour talking to each one) and both claim that there's nothing wrong with their servers, websites, or web pages, but instead lay the blame on FireFox; I'm starting to believe this, since I can log into my accounts using Chrome without any problems. This problem just started (for me) two days ago. And yes, I cleared all of my history, and I also shut down and re-started Firefox. So, with this background, What did Mozilla do recently to screw up Firefox?