Custom Timezone Offset

Custom Timezone Offset

Adjust RFP UTC time to match local time without giving away your real timezone

What is Custom Timezone Offset?
Custom Timezone Offset is a Firefox add-on that adjusts RFP UTC time to match your local time without giving away your real timezone. It fixes the date/time offset for websites and can be customized by user-defined or timezone settings. Works on Desktop and Mobile.
Merlin
Stats
This add-on was removed from Firefox Browser Add-ons on 2023-09-21
By: defkev
Users: 33
Rating: 4.50 (8)
Version: 0.0.4 (Last updated: 2022-08-22)
Creation date: 2021-11-01
Weekly download count: 20
Firefox on Android: Yes
Risk impact: Moderate risk impact
Risk likelihood: High risk likelihood
Manifest version: 2
Permissions:
  • <all_urls>
  • alarms
  • storage
  • webNavigation
Size: 20.90K
Stats date:

Other platforms

Not available on Chrome
Not available on Edge
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Merlin
Summary

If you set privacy.resistFingerprinting (RFP) to true in about:config you probably noticed that the date/time is off by a couple of hours on all websites if you don't happen to live in the UTC timezone.

The add-on fixes this by changing the offset, either user defined or by timezone, to match your local time.

This has the added benefit that you don't have to give away your real timezone which can be used to predict your location.

Works on Desktop and Mobile (only tested in Fenix)

Icons by Font Awesome (https://fontawesome.com/license)

User reviews
Works perfectly, solves the silliest problem I've ever faced in what is quite possibly the silliest way imaginable, I'm sure, but it does work. One suggestion: could you create a default blacklist for common sites that are known to not work and put that in a readme somewhere? Either the banner in "Preferences" or the "About" would be fine. Or, even better (but more work for you), just instantiate that blacklist automatically on install and edit it for updates, for the less-than-technically-inclined among us. For me, it was discovering that Google Docs doesn't work. The YouTube change must've been to a shared portion of the codebase; the autosave function doesn't like it, not one little bit. Another complaint (this is probably the joke, Mr Microsoft employee, but I'm going to gripe about it anyways): the common definitions for "whitelist" and "blacklist" are reversed. WRYYYYYYYYYYY! Clarity note: I used the common definitions in this review.
by mage, 2023-08-11
View all user reviews
Safety
Risk impact

Custom Timezone Offset may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.

Risk likelihood

Custom Timezone Offset may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

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