Originally Posted by joemikeb
It is the same code whether used in Monterey or Big Sur (Safari 15 uses webkit 17612.2.4.1.2 while Safari Technology Preview uses webkit 17613.1.1.5). Although I mostly use Monterey, we also have two macs running Big Sur and the experience is identical on both OS versions.
I updated both my clones as backups and installed Safari 15. Everything seems fine; no problems with financial sites.

Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365