How can this Stack Exchange site have an animated favicon?

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Music by Eric Matyas
https://www.soundimage.org
Track title: Quiet Intelligence

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Chapters
00:00 Question
00:30 Accepted answer (Score 70)
01:41 Answer 2 (Score 95)
02:00 Answer 3 (Score 23)
02:23 Answer 4 (Score 11)
02:56 Thank you

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Full question
https://superuser.com/questions/1484570/...

Question links:
https://stackexchange.com
[list of all Stack Exchange]: https://stackexchange.com/sites
[image]: https://i.stack.imgur.com/clcp5.gif

Accepted answer links:
[How to disable animated favicons?]: https://superuser.com/questions/1192869/...
[Violentmonkey]: https://addons.mozilla.org/en-US/firefox.../
[Help Center]: /help/
[Global Flag Summary]: https://stackapps.com/q/7173/34061

Answer 2 links:
[bug 111373]: https://bugzilla.mozilla.org/show_bug.cg...

Answer 3 links:
http://www.p01.org/defender_of_the_favic.../

Answer 4 links:
[this Stack Overflow thread]: https://stackoverflow.com/q/1837261/1247...

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Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...

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Tags
#browser #favicon

#avk47