The vertical tabs feature is exactly what it sounds like. Instead of having all tabs appear in a row at the top of the browser, they appear in a vertical stack on the side. This allows you to see a lot more tabs at once than what can fit in a horizontal row.
Publishers' adoption of generative AI is reducing the friction between content and format, making it easier for the same story to appear as shorter summaries, audio, or video, often in real time. To some publishers, a text article may soon be more of a vehicle for original reporting, not a final product. That information could become no longer available strictly in a static piece of content, but transformed into different shapes and formats, based on a reader's signals and preferences.