Screencast: The bug appear at 00:05- and 00:15-
Bug 1698846 Comment 4 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Screencast: https://www.youtube.com/watch?v=LnFn4cbnvMU The bug appear at 00:05- and 00:15-