> Many people will click the red "X" button automatically
Yeah I also think that the UI is a little confusing. The 4 window icons are too prominent, big and colorful compared to HOW OFTEN (I think) they are used. Especially the close window one. I would put these inside an ellipsis menu in the top right.

Bug: after picking a window color, the view doesn't return to show all tabs. I need to open the picker dialog again and click X to return. This is in contrast with renaming a window, which correctly returns to the main view.

The color picker dialog is really confusing. I don't understand what logic the pre-selected pastel colors are ordered by, e.g. the blue hues are all over the place.

I don't like the tinted hues of the dark mode. I would prefer a dark gray mode, not a "dark green mode", if you see what I mean. The color scheme is just unnatural, including the windows colors.

I hope these issues can be fixed in the future, otherwise it's a really useful extension to cut through the tab chaos!