From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ben Sturmfels <ben@sturm.com.au>
Subject: bug#35746: IceCat/Chromium timezone is wrong
Date: Wed, 22 Apr 2020 23:43:58 +1000
Message-ID: <87zhb3bppd.fsf@sturm.com.au>
References: <8736lfrh6y.fsf@sturm.com.au> <87y336hct1.fsf@gnu.org>
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In-Reply-To: <87d0khzc6f.fsf_-_@gnu.org> ("Ludovic =?UTF-8?Q?Court=C3=A8s?="'s
 message of "Fri, 17 May 2019 11:02:16 +0200")
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On Fri, 17 May 2019, Ludovic Court=C3=A8s wrote:

> Hi Ben,
>
> Ben Sturmfels <ben@sturm.com.au> skribis:
>
>> Possibly completely unrelated, but noting that both icecat and chromium
>> do this - which is wrong:
>>
>>> new Date().getTimezoneOffset()
>> 0
>>
>> Where node does this - which is correct:
>>
>>> new Date().getTimezoneOffset()
>> -600
>
> I noticed it in IceCat and thought it might be a privacy feature.
> But maybe it=E2=80=99s a genuine bug?
>
> Ludo=E2=80=99.

This does appear to be a privacy feature. To report the correct timezone of=
fset, go to  "about:config" and disable "privacy.resistFingerprinting" then=
 restart IceCat.

Note that toggling "privacy.resistFingerprinting" immediately changed the r=
esult of `new Date().toString()` on all tabs, but `new Date().getTimezoneOf=
fset()` was changed
only on the about:config tab. After a restart all tabs showed the correct o=
ffset.

See this IceCat bug report discussion:
https://lists.gnu.org/archive/html/bug-gnuzilla/2019-06/msg00010.html

Regards,
Ben