"What we now call the browser is whatever defines the web. What fits in the browser is the World Wide Web and a number of trivial standards to handle that so that the content comes."

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Anyone who slaps a 'this page is best viewed with Browser X' label on a Web page appears to be yearning for the bad old days, before the Web, when you had very little chance of reading a document written on another computer, another word processor, or another network.

— Tim Berners-Lee