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Microsoft Blocks Browser Choice for 1.4 Billion Windows 10/11 Users, Study Finds
(research.mozilla.org)
This is a most excellent place for technology news and articles.
and a lot of ie's bits were loaded into memory with windows itself.
Yeah that's the key point there, IE was faster, because it was using your memory even if you didn't want to use it. So loading netscape was running 2 browsers at a time, and thus slower than using 1.