Tor Browser Incorrect display of datetimes with a timezone

[sanderson]

Operating System you are using

• Linux Devuan Daedalus

Tor Browser version

• Tor Browser 13.5

Tor Browser Security Level

• Standard

Not conveniently reproducible because pre-registered car details are required to make a booking.

• Web page: via Hampshire HWRC
• Site purpose: make appointment at a recycling centre

First available slot is at 09:00, last available 17:30. The timezone of the datetimes from the server is also my timezone, GMT+1.

Server provides datetimes in json:

        ...
        "times": [
          { ..., "datetime": "2024-07-03T09:00:00+01:00" },
          ...
         ]
        ...

Firefox-esr’s javascript interpreter displays this on the web page buttons correctly as “09:00”. Tor Browser labels the buttons using UTC, so “08:00” in this case. This is incorrect and misleading.

Is it a feature or a bug? Is there a work-around? I don’t see this hiding-the-timezone as providing any protection to me.

Screenshot shows the different representation in Tor Browser 13.5 and Firefox-esr.

Thanks for looking.

[thorin]

You’re booking in Hampshire UK where the timezone there is currently GMT+1

This is working exactly as expected. Firefox knows your real timezone (+1) is showing times from 9:00 on. Tor Browser is reporting timezone (+0) and is starting from 8:00

Here’s my Firefox using New Zealand time - the times start from 20.00 (NZ is currently +12)

And here is Tor Browser - same as yours … starts at 8:00

[sanderson]

Thank you, I hadn’t noticed that browsers “translate” times to the their own timezone. Very instructive to see that page in New Zealand time.