Since posting my comment such a LOOOONG time ago (gee! almost 3 hours!), I have discovered that Edge, Chrome, and Opera do support display of MHTML files. We don't want Firefox (My FAVORITE of all) to be left as the only major browser NOT doing this...
Enable Firefox to Display .mhtml format files
Currently (September 2023), Microsoft Outlook displays a link "View in Browser" on its email messages.
However, Outlook messages are in the .mht or .mhtl format, and the ONLY browser that will currently d...
