When in the tabs view, trying to close a tab is a hit-or-miss deal, mostly miss, because the close-tab button is too small to dependably hit. I like the list view, but in that view it was damn near impossible to close rather than select a tab. This thumbnail view is a bit better on that matter, but not enough better. Have a look:
This could easily be rectified by making the close-tab button larger. I reckon 50% larger would help, 75% larger would fix the problem entirely, and 100% larger would fix it with comfortable margin for those of us with imperfect vision trying to do a quick thing without fumbling with our glasses.
(Yes, that means I experience this as an accessability barrier)
Orion 1.3.18 (6) (WebKit 8618.5.1.10.5) under iOS 17.7.2
17