Overall a pretty good design, however there are just a few bugs that need to be fixed.
1. The extension cannot remember when I turn on light mode. When I open a new tab, its always in dark mode. If I turn on use system appearance, the screen always starts of dark and then turns light, but it makes it look clunky.
2. When adding bookmarks, it requires a"http s://" thing, but when I press "/" it automatically jumps to the search bar.
One further suggestion is allowing us to add backgrounds and then give the option to blur them if we want.
Other than that, this is a great extension!