Bug 1744944 Comment 14 Edit History

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> It was very revealing that ZDNET e-mail tries to track users by showing presumably one-by-one pixel images. (Not sure if TB HTML e-mail reader tries to protect such tracking in comparison to FF.)

One of them is 10000x1 gif pixel. How clever. even if FF tries to block 1x1 or some such pixel, I wonder if it blocks 10000x1 gif that is used for tracking. (It may be even used as a seemingly valid horizontal line in combination with CSS. Devilishly clever.)
> It was very revealing that ZDNET e-mail tries to track users by showing presumably one-by-one pixel images. (Not sure if TB HTML e-mail reader tries to protect such tracking in comparison to FF.)

One of them is 10000x1 gif pixel. How clever. even if FF tries to block 1x1 or some such pixel, I wonder if it blocks 10000x1 gif that is used for tracking. (It may be even used as a seemingly valid horizontal line in combination with CSS. Devilishly clever.)

https://p.liadm.com/imp?s=126516200&amp%3Bli=e539&amp%3Be=someone%40example.com&amp%3Bp=13964728&amp%3Blctg=29740922105489098244944093120284&amp%3Bstpe=pixel&_lc2_fpi=d00f53d4c5a2--01gawt3twdwen1ceyz0cv8gvyj

Actually, I did not modify the strange strings. They *may* encode the original e-mail addresses, etc.

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