Opera

Opera's long-running interface signature is the sidebar, a vertical rail down the left edge that docks messaging apps, tools, and panels you keep open beside the page rather than spending tabs on them. A chat app or music player lives there persistently, a genuinely different model for the always-on services people return to all day. The Speed Dial new-tab page, a grid of large visual bookmark tiles, was Opera's idea before everyone borrowed it. The chrome can feel busy, the sidebar plus integrated VPN, ad-blocker, and assorted widgets stack up, and the frame asks you to manage more surfaces than a minimal browser does. But the core insight holds: some web destinations are appliances, not pages, and they deserve a dock.