This sounds like a reported problem in Support Forum - on Windows 11 OS https://support.mozilla.org/en-US/questions/1411434 Thunderbird 102.10.1 User in Spain and Windows 11 set up correctly for Date/Time and Timezone Using Thunderbird English GB regardless of whether using Settings > General > Date & Time Formating - 'Application locale' en-GB or 'Regional settings locale' Spain Date column in Message List and Message Pane header is always UTC Error console using Date() always returns UTC/GMT privacy.resistFingerprinting = false User has provided good images and info at link. privacy.resistFingerprinting = true will cause Date to be UTC and ignore correct date/times privacy.resistFingerprinting = false normally means correct date time is shown. Attempting to reset to true, restart Thunderbird then reset to 'false' and restart Thunderbird had no effect.
Bug 1817004 Comment 9 Edit History
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This sounds like a reported problem in Support Forum - on Windows 11 OS https://support.mozilla.org/en-US/questions/1411434 Thunderbird 102.10.1 User in Spain and Windows 11 set up correctly for Date/Time and Timezone Using Thunderbird English GB regardless of whether using Settings > General > Date & Time Formating - 'Application locale' en-GB or 'Regional settings locale' Spain Date column in Message List and Message Pane header is always UTC Error console using Date() always returns UTC/GMT privacy.resistFingerprinting = false User has provided good images and info at link. privacy.resistFingerprinting = true will cause Date to be UTC and ignore correct date/times privacy.resistFingerprinting = false normally means correct date time is shown, but in this instance it fails. Attempting to reset to true, restart Thunderbird then reset to 'false' and restart Thunderbird had no effect. Stuck on UTC time.
This sounds like a reported problem in Support Forum - on Windows 11 OS https://support.mozilla.org/en-US/questions/1411434 Thunderbird 102.10.1 User in Spain and Windows 11 set up correctly for Date/Time and Timezone Using Thunderbird English GB regardless of whether using Settings > General > Date & Time Formating - 'Application locale' en-GB or 'Regional settings locale' Spain Date column in Message List and Message Pane header is always UTC Error console using Date() always returns UTC/GMT privacy.resistFingerprinting = false User has provided good images and info at link. privacy.resistFingerprinting = true will cause Date to be UTC and ignore correct date/times privacy.resistFingerprinting = false normally means correct date time is shown, but in this instance it fails. Attempting to reset to true, restart Thunderbird then reset to 'false' and restart Thunderbird had no effect. Stuck on UTC time. Thunderbird users require correct time/date for emails so by default need 'privacy.resistFingerprinting' = 'false' - I'm not sure whether anyone would require it setting to anything else for obvious reasons. Why is it even a setting in Thunderbird ? Getting a fix on this is important and urgent.