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Otherwise, Chrome may reject the certificate with ERR_CERT_VALIDITY_TOO_LONG
The setting value(s) must be typed in directly. Default values are not shown in the about:config tab.
I'm actually missing those settings in QuickExec, though I am running the latest version of FIddler. Am I doing something wrong here?
Workaround for End-Users until Telerik Fixes this:
Run about:config in QuickExec to edit prefs.
The fiddler.certmaker.ValidDays preference controls the validity length, which defaults to five years; however, fiddler.certmaker.GraceDays is 366 by default (meaning cert validity starts one year ago).
You won't be notified about changes to this idea.