> Support for new scrollbar style in Mac OS X 10.7 and newer

Finally. That one took quite a long time for them. It looks simple in the change log, but I suspect that it was actually quite a big change under the hood.

EDIT: Woops, it seems that this is an error on release page, since they've hit a regression [1] and they've pulled the feature, it's due to come back in v24. And is seems I was right that this was actually a pretty big change under the hood [2].

EDIT 2: And they now removed the error about new scrollbar from the article.

[1] https://bugzilla.mozilla.org/show_bug.cgi?id=636564#c244

[2] https://bug636564.bugzilla.mozilla.org/attachment.cgi?id=744...