Erm, the visual viewport event handling was developed in parallel to bug 1044074, so when both patches landed within a few days of each other, neither took account of the event handling changes caused by the other path.
Bug 1515778 Comment 2 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Erm, the visual viewport event handling was developed in parallel to bug 1044074, so when both patches landed within a few days of each other, neither took account of the event handling changes caused by the other patch.