F9 does, indeed expose all windows but it might be easier to press F10 instead (while in Safari). This shows only the active windows in Safari (or whatever current application you are in) so it will not show windows in other apps.

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