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If "do not track" enabled, Matomo still tracks Chromium, Safari, Edge visitors using Privacy/Incognito modes #19993

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atom-box opened this issue Nov 11, 2022 · 1 comment
Open

If "do not track" enabled, Matomo still tracks Chromium, Safari, Edge visitors using Privacy/Incognito modes #19993

atom-box opened this issue Nov 11, 2022 · 1 comment
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@atom-box
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atom-box commented Nov 11, 2022 •
edited

Expected:
Visitors using a browser in Privacy Mode will not be counted by Matomo if Matomo is set like this:
Matomo interface >> ⚙️ >> Privacy >> Users opt-out >> "Support do not track" >> Enable

Actual:
Only visitors from desktop Firefox version 103 were completely invisible to Matomo. The other four visitors were counted by Matomo as a visit.

I tested this for visitors using five different browsers.

Matomo correctly records no visit for visitors in this browser:

  • Firefox desktop v103 Privacy Mode

Matomo incorrectly records visits for visitors arriving in privacy mode from the following browsers:

  • Safari iOS Privacy Mode
  • Firefox iOS Privacy Mode
  • Edge desktop Privacy Mode
  • Chromium desktop Privacy Mode
@atom-box atom-box added the Potential Bug Something that might be a bug, but needs validation and confirmation it can be reproduced. label Nov 11, 2022
@sgiehl
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sgiehl commented Nov 11, 2022

Maybe those browsers don't send the DNT header in incognito mode. But anyways: DNT's working group has meanwhile be discontinued in 2019 (see https://www.w3.org/2011/tracking-protection/), so not sure if we maybe shouldn't consider to remove it fully in the future. Safari already removed DNT support in one of their latest releases.

@sgiehl sgiehl added RFC Indicates the issue is a request for comments where the author is looking for feedback. and removed Potential Bug Something that might be a bug, but needs validation and confirmation it can be reproduced. labels Nov 11, 2022
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