How do you open an MHT file?

This is a web archive saved by Internet Explorer which includes all the images etc. with the links revised to make it work. You may be able to open it in Google Chrome.

https://fileinfo.com/extension/mht

https://whatis.techtarget.com/fileformat/MHT-MHTML-document-Microsoft suggests that these files may be infected and should be scanned before opening.