See the example scenario explain in https://bugzilla.mozilla.org/show_bug.cgi?id=1313577#c12 for more details.
Bug 1622801 Comment 0 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
See the example scenario explained in https://bugzilla.mozilla.org/show_bug.cgi?id=1313577#c12 for more details.