From b73e315c5989064955f27242a6cd65d9662b9b49 Mon Sep 17 00:00:00 2001 From: Samuel FORESTIER Date: Sun, 28 Sep 2025 14:33:49 +0200 Subject: [PATCH] Explicitly disables system timezone detection (9312) Starting with Thunderbird 115ESR, system timezone detection no longer relies solely on the `calendar.timezone.local` preference. > closes #69 --- user.js | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/user.js b/user.js index f2f3069..38336b2 100644 --- a/user.js +++ b/user.js @@ -1501,10 +1501,12 @@ user_pref("mail.chat.notification_info", 2); /** CALENDAR ***/ /* 9312: Set calendar timezone to avoid system detection [SETUP-INSTALL] - * By default, extensive system detection would be performed to find user's current timezone. - * Setting this preference to "UTC" should disable it. + * By default, extensive system detection is performed to find current timezone (if OS supports it). + * Disable system detection and set timezone to "UTC". * You may also directly set it to your timezone, i.e. "Pacific/Fakaofo" - * [SETTING] Calendar > Calendar > Timezone ***/ + * [SETTING] Calendar > Calendar > Set timezone manually / Timezone + * [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1606357 ***/ +user_pref("calendar.timezone.useSystemTimezone", false); user_pref("calendar.timezone.local", "UTC"); // [DEFAULT: ""] /* 9313: Disable calendar service performing event "extraction" from email content ***/ // user_pref("calendar.extract.service.enabled", false); // [DEFAULT: false]