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nytimes detecting Private Mode

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I updated to Firefox 66 on Linux yesterday. I don't know if it's the browser version, but I noticed that nytimes.com started picking up that I'm browsing the site in private mode.

Interestingly, this is something that used to happen on my Chrome book when I used private mode, but this on Firefox, this is a first for me. It may well be that nytimes changed their code to do this, but I wonder upgrade to FF 66 contributed to this.

In any case, I wonder how a site can pick up if the user is browsing in private mode.

I updated to Firefox 66 on Linux yesterday. I don't know if it's the browser version, but I noticed that nytimes.com started picking up that I'm browsing the site in private mode. Interestingly, this is something that used to happen on my Chrome book when I used private mode, but this on Firefox, this is a first for me. It may well be that nytimes changed their code to do this, but I wonder upgrade to FF 66 contributed to this. In any case, I wonder how a site can pick up if the user is browsing in private mode.

Chi tiết hệ thống bổ sung

Phần bổ trợ đã cài đặt

  • Shockwave Flash 32.0 r0

Ứng dụng

  • Chuỗi đại diện người dùng: Mozilla/5.0 (X11; Linux x86_64; rv:66.0) Gecko/20100101 Firefox/66.0

Thông tin chi tiết

WestEnd 60 giải pháp 5387 câu trả lời
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PB if detected by the site might now let you access since they sometimes require tracking or cookies to work.

PB if detected by the site might now let you access since they sometimes require tracking or cookies to work.

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jscher2000
  • Top 10 Contributor
8838 giải pháp 72240 câu trả lời
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Câu trả lời hữu ích

In private windows, Firefox disables saving data to disk using IndexedDB, so that is one possible characteristic sites might use.

In private windows, Firefox disables saving data to disk using IndexedDB, so that is one possible characteristic sites might use.
jscher2000
  • Top 10 Contributor
8838 giải pháp 72240 câu trả lời
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Câu trả lời hữu ích

There was a thread on Reddit recently: https://www.reddit.com/r/firefox/comments/b0c5ea/preventing_incognito_mode_detection/

Người tạo câu hỏi

Thanks.

A 7-years-old bug!

Thanks. A 7-years-old bug!