we just ran into this for the mozillafoundation.org site, where a sticky is greatly interfering with #fragmentid navigation, so the sooner FF is on parity with Chrome/Opera/Safari for this property, the better.
Bug 1373832 Comment 4 Edit History
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we just ran into this for the mozillafoundation.org site, where a sticky header is greatly interfering with proper #fragmentid navigation in FF, but not in Chrome and friends, so the sooner FF hits parity for this property, the better.