This issue is verified as fixed on Firefox 68.0a1 (20190409221047) under Win 7 64-bit and Mac OS X 10.14.1. Please see the attached video.
Bug 1525173 Comment 5 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
This issue is verified as fixed on Firefox 68.0a1 (20190409221047) under Win 7 64-bit and Mac OS X 10.14.1. Please see the attached screenshot.