Microsoft fixes 5-year-old Windows Defender bug that killed Firefox performance

Started by ky331, April 10, 2023, 06:46:14 PM

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"The solution was delivered to the stable channel with updated Defender antimalware definitions on April 4 (mpengine.dll version 1.1.20200.4) and the bug was finally closed. Mozilla developers said that the Defender update would provide a massive ~75% improvement in CPU usage while browsing the web with Firefox".



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That is amazing.   That bug made me ditch FireFox.  I remember spending many hours trying to find a way to fix FF excessive CPU useage that would build and build until it froze my processor.  And here it was a MicroSoft bug all this time.