In June of 2009, IE had 65% market share. In July of 2021 it has less than 1%, with Microsoft's replacement Edge only holding 3.5%. What was once the dominant force in the browser wars has declined into irrelevance. What lessons can we learn from IE's slide into obscurity?

Statscounter data: https://gs.statcounter.com/browser-market-share#monthly-200901-202107

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