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I am on Windowns 10 on Surface Pro 4, running the current Nightly Here is a recording of opening Nightly and navigating to a few websites, with disk and cpu activity visible. (something most of our users will probably not do) I reproduced this in a new profile, and so far the only thing that helped is excluding the Firefox process from Windows Defender Antivirus. This is considerably slowing me down and makes Firefox feel really slow. I noticed that for some time now most of the time Firefox is active, the Windows 10 built in `Antimalware Service Executable` is using well above *30% of my CPU*, and is reading and writing random files in `Windows/Temp`, all starting with `etilqs_`.
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