did not work for me, but thanks. perhaps some modification for the terminal command...?Not sure whether this method still works in Safari 15 but Mac Rumors has a guide to disabling tab previews in Safari 14.
How to Disable Tab Previews in Safari on Mac
In Safari 14, Apple introduced a new feature called tab previews, where hovering your mouse pointer over a non-active browser tab shows an image...www.macrumors.com
EDIT: gonna reboot my macbook, because, on my imac, i now only see the page name & title. on my macbook, still getting full page previews. hmmmm....
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