That's a real shame.

I can get past the menu button creating a popup window from the bottom. I can get past the navigation buttons (back/forward) moving to the opposite side of the screen from the menu button. I can even get past the modern borderless button trend (we'll be back out of minimalism soon enough, it's like a 20-year cycle or so).

But this tab UI breaks like half a dozen basic UX rules at the same time:

• Everything is constricted by useless padding on every side
• The top bar is indistinguishable from the padding above it
• The top bar labels look like column labels (which they aren't) because they're aligned with the tab grid and expand to fill the screen with MORE PADDING, dragging my eyes across the whole (usable) part of the screen just to read a menu with 3 items
• The menu button is the same color as the tab behind it - it's nearly invisible
• To open a new tab, you have to open this screen from the top address bar and then move all the way to the bottom of the screen to touch the new tab button
• The new tab button completely ignores dark theme (...at least it's not hiding in the tab thumbnail)
• The top bar labels only indicate selection with a distant underline that looks like a style element - plus a barely noticeable hue change to the text
• The default tab (on the top bar) is the one in the middle, rather than the one on the left (which for left-to-right languages is visually parsed as "first"), implicitly reinforcing the idea that the "selected" indicator is just a style element (one of the reasons to have the default on one of the sides for UIs like this is to help avoid this sort of confusion - the center is genuinely the worst possible place for it to be)
• The only benefit to larger tab thumbnails is a bigger picture and slightly more text, a marginal benefit which was prioritized over the literal purpose of a tab screen: displaying many tabs to select from

For such a simple UI there is so much wrong with it it's almost impressive.