Ah, a script/plugin as a workaround? Maybe, but do the sites with animates favicons deserve so much attention? Do you know any useful web site with animated favicon?
That's useful, My webmail (yandex) has this feature too.
I think such notifications is not what this ticket is about. Not just because technically in this use case favicon is replaced, not animated.
The ticket IMHO is about favicons which constantly move.
In any case, if I don't like a web site (its favicon, or the content) I don't use it; I personally don't see the anymated favicons as a serious problem and wouldn't spend any hour of my time working on it. Moreover we don't have right to demand it from FireFox team.
Although I understand the author of this post, I sometimes feel annoyed by certain features or problems in software too. Give it some time, and you will forget about it :)