I have Firefox 99.0.1 (64-Bit) now & have not had a problem in the past accessing https://customer.xfinity.com/#/services/internet#usage. Now, it partially loads & often get the "SSL_ERROR_BAD_MAC_ALERT" error. In looking it up, this error appears to be specific to Firefox. It was an issue 3 years ago: [[https://support.mozilla.org/en-US/questions/1256432|https://support.mozilla.org/en-US/questions/1256432]]. For the past few years, Firefox has had more problems with websites that work fine in other browsers, even the EDGE browser. Even in the 3-year-old bug mention above, it works in other browsers, but in the Firefox browser fails. Firefox needs to fix this bug. It should not be an issue for over 3 years, especially when it works fine in other browsers.