Brief Summary
I'd like Orion to temporarily expand the tabs sidebar when it's collapsed and the user hovers their mouse over it. It would improve the experience by providing more screen real-estate when the tabs aren't needed without sacrificing information when they are needed.
Details:
I see a user using this feature when they want to maximize their available screen for their web browsing content, but don't want to lose their tab names and tree structures. The option to expand it when hovering means the user can choose when they want to see that additional information and when they don't without having to manually drag the sidebar each time.
Image/Video:
Brave's implementation of this feature: