in vertical tabs mode, above the address bar the windows should be to be grabbed

[eldobhatox]

in vertical tabs mode, above the address bar the windows should be to be grabbed. there's only a few pixels there but that is enough. I usually just bump the cursor against the edge of the screen and click+hold but in this mode this is not possible. please add!

[Jon]

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[Astral]

In the latest nightly version, this detail seems to be already available