Internet Explorer 6
The browser that haunted your dreams and broke your websites. Used only because you had no choice.
Quick Bits
What It Was
Internet Explorer 6 was Microsoft's dominant browser during a huge stretch of the early consumer web, mostly because it showed up with Windows and simply refused to leave. A lot of people used it by default, not by choice.
Why It Mattered
Its market share meant it warped how websites were built, tested, and broken. IE6 mattered not because it was elegant, but because developers had no choice except to appease it like a cursed monarch.
Why It Is Infamous
Security flaws, awful standards support, and endless corporate dependency made IE6 a recurring headache for basically everyone.
It is still legendary because it turned browser compatibility into a profession-level suffering ritual during a formative stretch of the web.