Arc

Arc is the only recent browser to have rethought the object itself instead of piling up tabs. Spaces separate contexts: one for work, one for life, each with its own tabs and profile. Little Arc, my favourite decision: a link clicked from another app opens in a disposable mini-window, read then closed, never polluting the main space. And the Spotlight-style command palette makes the mouse optional. The site tells all of this with big headlines and full-frame captures of the browser in real use — no abstract mockups. The homepage is now dominated by the Dia announcement, but Arc is still there to download, and those three interaction ideas haven't aged a day.