I'm on Safari 26.1 (20622.2.11.119.1) and MacOS 15.6.1 (24G90)
I've tried the 6x6 commands and they don't work for me. I tried running with sudo. I tried to give Terminal Full Disk access. I also looked for the three dots for Compact but they're not present.
I see other comments about a new Safari update that allegedly enables the three dots. I really don't want to update just to restore settings that were previously removed. I'm going to run this update and if those dots aren't there or something else gets worse, I'm going to be super displeased.
Going back to when Apple completely destroyed WatchOS, I've intentionally disabled auto-updates on all my devices to avoid imposing irrational UX changes. I'm not sure how this could have changed on my computer.
Update: The upgrade to Safari 26.2 (20623.1.14.18.4) did in fact enable the ••• menu. Selecting Compact improved the UX. However, it's not fully the same. Also nice to get rid of Recently Saved items by disabling Show Folders on Top.
I will never understand the reasoning to make the user experience less user friendly for the sake of nothing more than change. There are plenty, plennnnnty, of issues that have been reported in Mac OS for a decade that Apple has not fixed. These needless aggravations continue to push me away from the Apple ecosystem towards more specialized and stable software.