Microsoft fixes 5-year-old Defender bug, reducing Firefox-related CPU use by 75%

Re:Microsoft fixes 5-year-old Defender bug, reducing Firefox... by sterlind on Monday April 10, 2023 @03:21PM (#35516243)

I work at MS, tried to use Firefox but couldn't because FF doesn't integrate with the Windows cert store. Crucially, this keeps Windows Hello (TPM auth) from working, which makes it useless for any internal websites. For a while I used a hand-compiled PKCS#12 plugin that bridged to the cert store, but that was extremely fragile and eventually I gave up.

I think this is probably a major blocker for many enterprise users, and wish Mozilla would have fixed it.

edit: it looks like they may have fixed this in the past couple years, though you might have to go poking around in about:config.

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Re:Microsoft fixes 5-year-old Defender bug, reducing Firefox... by reynoldsbd on Monday April 10, 2023 @03:36PM (#35516429)

Current MS employee here. For a time this was true, but FF recently added this integration. No about:config needed, there’s simply a checkbox under the FF security settings. Since this was added, I have gone back to using FF as my daily driver, and I haven’t really encountered any other friction.

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Re:Microsoft fixes 5-year-old Defender bug, reducing Firefox... by protastus on Monday April 10, 2023 @03:55PM (#35516669)

Indeed. https://support.mozilla.org/en-US/kb/windows-sso

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Re:Microsoft fixes 5-year-old Defender bug, reducing Firefox... by pixel16 on Monday April 10, 2023 @03:29PM (#35516354)

Microsoft now blocks non edge browsers with conditional access policies.

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Re:Microsoft fixes 5-year-old Defender bug, reducing Firefox... by anonymousiam on Monday April 10, 2023 @03:54PM (#35516641)

Firefox not integrating with the Windows cert store is actually a good thing in many use cases. The ability to have an alternate browser that's not integrated has saved my butt more than once.

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